newpx (22may21)

git-svn-id: svn://tug.org/texlive/trunk@59303 c570f23f-e606-0410-a88d-b1316a301751

25 files changed, 494 insertions, 41 deletions

diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zpllf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zpllf.fd
index 813c8a8e28b..015ec403252 100644
--- a/Master/texmf-dist/tex/latex/newpx/ly1zpllf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zpllf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ly1zpllf.fd}[2015/01/17 v1.0 font definition file for LY1/zpl/lf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{LY1}{zpllf}{bx}{n}{<->ssub * zpllf/b/n}{}
 \DeclareFontShape{LY1}{zpllf}{bx}{scit}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{LY1}{zpllf}{bx}{it}{<->ssub * zpllf/b/it}{}
-\DeclareFontShape{LY1}{zpllf}{m}{sl}{<-> \zpl@scaled zpl-Italic-tlf-th-ly1}{}
-\DeclareFontShape{LY1}{zpllf}{b}{sl}{<->ssub * zpllf/b/it}{}
-\DeclareFontShape{LY1}{zpllf}{bx}{sl}{<->ssub * zpllf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{LY1}{zpllf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-lf-ly1}{}
+  \DeclareFontShape{LY1}{zpllf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-lf-ly1}{}
+  \DeclareFontShape{LY1}{zpllf}{bx}{sl}{<->ssub * zpllf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{LY1}{zpllf}{m}{sl}{<-> \zpl@scaled zplth-Italic-tlf-ly1}{}
+  \DeclareFontShape{LY1}{zpllf}{b}{sl}{<->ssub * zpllf/m/sl}{}
+  \DeclareFontShape{LY1}{zpllf}{bx}{sl}{<->ssub * zpllf/m/sl}{}
+\fi
 \DeclareFontShape{LY1}{zpllf}{b}{scsl}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{LY1}{zpllf}{bx}{scsl}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{LY1}{zpllf}{m}{scsl}{<->ssub * zpllf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zplosf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zplosf.fd
index f3e136c041d..fb669ea1b11 100644
--- a/Master/texmf-dist/tex/latex/newpx/ly1zplosf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zplosf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ly1zplosf.fd}[2015/01/17 v1.0 font definition file for LY1/zpl/osf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{LY1}{zplosf}{bx}{n}{<->ssub * zplosf/b/n}{}
 \DeclareFontShape{LY1}{zplosf}{bx}{scit}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{LY1}{zplosf}{bx}{it}{<->ssub * zplosf/b/it}{}
-\DeclareFontShape{LY1}{zplosf}{m}{sl}{<-> \zpl@scaled zpl-Italic-osf-th-ly1}{}
-\DeclareFontShape{LY1}{zplosf}{b}{sl}{<->ssub * zplosf/b/it}{}
-\DeclareFontShape{LY1}{zplosf}{bx}{sl}{<->ssub * zplosf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{LY1}{zplosf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-osf-ly1}{}
+  \DeclareFontShape{LY1}{zplosf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-osf-ly1}{}
+  \DeclareFontShape{LY1}{zplosf}{bx}{sl}{<->ssub * zplosf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{LY1}{zplosf}{m}{sl}{<-> \zpl@scaled zplth-Italic-osf-ly1}{}
+  \DeclareFontShape{LY1}{zplosf}{b}{sl}{<->ssub * zplosf/m/sl}{}
+  \DeclareFontShape{LY1}{zplosf}{bx}{sl}{<->ssub * zplosf/m/sl}{}
+\fi
 \DeclareFontShape{LY1}{zplosf}{b}{scsl}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{LY1}{zplosf}{bx}{scsl}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{LY1}{zplosf}{m}{scsl}{<->ssub * zplosf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zplth-lf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zplth-lf.fd
new file mode 100644
index 00000000000..5a931f378b6
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zplth-lf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ly1zplth-lf.fd}[2021/05/07 v1.0 font definition file for LY1/zplth/lf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{LY1}{zplth-lf}{\zpl@spacing}
+\DeclareFontShape{LY1}{zplth-lf}{m}{it}{<-> \zpl@scaled zplth-Italic-tlf-ly1}{}
+\DeclareFontShape{LY1}{zplth-lf}{m}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{m}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{m}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{b}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{bx}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{b}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{bx}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{b}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{bx}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{b}{it}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{bx}{it}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{m}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{b}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{bx}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{b}{scsl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{bx}{scsl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{LY1}{zplth-lf}{m}{scsl}{<->ssub * zplth-lf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zplth-osf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zplth-osf.fd
new file mode 100644
index 00000000000..850dde690bb
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zplth-osf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ly1zplth-osf.fd}[2021/05/07 v1.0 font definition file for LY1/zplth/osf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{LY1}{zplth-osf}{\zpl@spacing}
+\DeclareFontShape{LY1}{zplth-osf}{m}{it}{<-> \zpl@scaled zplth-Italic-osf-ly1}{}
+\DeclareFontShape{LY1}{zplth-osf}{m}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{m}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{m}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{b}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{bx}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{b}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{bx}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{b}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{bx}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{b}{it}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{bx}{it}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{m}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{b}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{bx}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{b}{scsl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{bx}{scsl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{LY1}{zplth-osf}{m}{scsl}{<->ssub * zplth-osf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zplth-tlf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zplth-tlf.fd
new file mode 100644
index 00000000000..6f55f125a68
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zplth-tlf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ly1zplth-tlf.fd}[2021/05/06 v1.0 font definition file for LY1/zplth/tlf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{LY1}{zplth-tlf}{\zpl@spacing}
+\DeclareFontShape{LY1}{zplth-tlf}{m}{it}{<-> \zpl@scaled zplth-Italic-tlf-ly1}{}
+\DeclareFontShape{LY1}{zplth-tlf}{m}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{m}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{m}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{b}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{bx}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{b}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{bx}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{b}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{bx}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{b}{it}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{bx}{it}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{m}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{b}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{bx}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{b}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{bx}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tlf}{m}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zplth-tosf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zplth-tosf.fd
new file mode 100644
index 00000000000..e16756124eb
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zplth-tosf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ly1zplth-tosf.fd}[2021/05/07 v1.0 font definition file for LY1/zplth/tosf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{LY1}{zplth-tosf}{\zpl@spacing}
+\DeclareFontShape{LY1}{zplth-tosf}{m}{it}{<-> \zpl@scaled zplth-Italic-osf-ly1}{}
+\DeclareFontShape{LY1}{zplth-tosf}{m}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{m}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{m}{scit}{<-> ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{b}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{bx}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{b}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{bx}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{b}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{bx}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{b}{it}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{bx}{it}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{m}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{b}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{bx}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{b}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{bx}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{LY1}{zplth-tosf}{m}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zpltlf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zpltlf.fd
index 9e2d9d4a472..041ab7cb16f 100644
--- a/Master/texmf-dist/tex/latex/newpx/ly1zpltlf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zpltlf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ly1zpltlf.fd}[2015/01/17 v1.0 font definition file for LY1/zpl/tlf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{LY1}{zpltlf}{bx}{n}{<->ssub * zpltlf/b/n}{}
 \DeclareFontShape{LY1}{zpltlf}{bx}{scit}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{LY1}{zpltlf}{bx}{it}{<->ssub * zpltlf/b/it}{}
-\DeclareFontShape{LY1}{zpltlf}{m}{sl}{<-> \zpl@scaled zpl-Italic-tlf-th-ly1}{}
-\DeclareFontShape{LY1}{zpltlf}{b}{sl}{<->ssub * zpltlf/b/it}{}
-\DeclareFontShape{LY1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{LY1}{zpltlf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-tlf-ly1}{}
+  \DeclareFontShape{LY1}{zpltlf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-tlf-ly1}{}
+  \DeclareFontShape{LY1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{LY1}{zpltlf}{m}{sl}{<-> \zpl@scaled zplth-Italic-tlf-ly1}{}
+  \DeclareFontShape{LY1}{zpltlf}{b}{sl}{<->ssub * zpltlf/m/sl}{}
+  \DeclareFontShape{LY1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/m/sl}{}
+\fi
 \DeclareFontShape{LY1}{zpltlf}{b}{scsl}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{LY1}{zpltlf}{bx}{scsl}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{LY1}{zpltlf}{m}{scsl}{<->ssub * zpltlf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/ly1zpltosf.fd b/Master/texmf-dist/tex/latex/newpx/ly1zpltosf.fd
index af826e3c4bb..178c165a929 100644
--- a/Master/texmf-dist/tex/latex/newpx/ly1zpltosf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ly1zpltosf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ly1zpltosf.fd}[2015/02/07 v1.0 font definition file for LY1/zpl/tosf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -23,9 +25,15 @@
 \DeclareFontShape{LY1}{zpltosf}{bx}{n}{<->ssub * zpltosf/b/n}{}
 \DeclareFontShape{LY1}{zpltosf}{bx}{scit}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{LY1}{zpltosf}{bx}{it}{<->ssub * zpltosf/b/it}{}
-\DeclareFontShape{LY1}{zpltosf}{m}{sl}{<-> \zpl@scaled zpl-Italic-osf-th-ly1}{}
-\DeclareFontShape{LY1}{zpltosf}{b}{sl}{<->ssub * zpltosf/b/it}{}
-\DeclareFontShape{LY1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{LY1}{zpltosf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-tosf-ly1}{}
+  \DeclareFontShape{LY1}{zpltosf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-tosf-ly1}{}
+  \DeclareFontShape{LY1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{LY1}{zpltosf}{m}{sl}{<-> \zpl@scaled zplth-Italic-osf-ly1}{}
+  \DeclareFontShape{LY1}{zpltosf}{b}{sl}{<->ssub * zpltosf/m/sl}{}
+  \DeclareFontShape{LY1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/m/sl}{}
+\fi
 \DeclareFontShape{LY1}{zpltosf}{b}{scsl}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{LY1}{zpltosf}{bx}{scsl}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{LY1}{zpltosf}{m}{scsl}{<->ssub * zpltosf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/newpxtext.sty b/Master/texmf-dist/tex/latex/newpx/newpxtext.sty
index 776533b9749..9abba0ef576 100644
--- a/Master/texmf-dist/tex/latex/newpx/newpxtext.sty
+++ b/Master/texmf-dist/tex/latex/newpx/newpxtext.sty
@@ -8,8 +8,8 @@
 % Modified the definition of \k to bypass problem with grouping.
 % Text is now directed to an extension of TeXGyrePagella rather than ppl.
 
-\def\fileversion{1.415}
-\def\filedate{2021/03/22}
+\def\fileversion{1.42}
+\def\filedate{2021/05/20}
 \ProvidesPackage{newpxtext}[\filedate\space v\fileversion]
 
 \message{`newpxtext' v\fileversion, \filedate\space Text macros taking advantage of TeXGyre Pagella and its extensions (msharpe)}
@@ -41,6 +41,7 @@
 \define@boolkey{zpl}{largesc}[true]{%
 \csname zpl@largesc#1\endcsname}
 \newif\ifzpl@thrm
+\newif\ifzpl@sl 
 \define@key{zpl}{helvratio}[0.94]{\def\zpl@helvratio{#1}}
 \define@key{zpl}{scaled}[1.0]{\def\zpl@scaled{s*[#1]}%
 \def\zpl@scale{#1}}
@@ -56,6 +57,7 @@
 \DeclareOption{lining}{\edef\zpl@figurestyle{lf}}
 \DeclareOption{lf}{\edef\zpl@figurestyle{lf}}
 \DeclareOption{theoremfont}{\zpl@thrmtrue}
+\DeclareOption{trueslanted}{\zpl@sltrue}
 \DeclareOption{oldstyle}{\useosf}
 \DeclareOption{osf}{\useosf}
 \DeclareOption{tabular}{\edef\zpl@figurealign{t}}
@@ -158,7 +160,7 @@
 		\newtheoremstyle{plain}
 		{\medskipamount}   % ABOVESPACE, was \topsep
     	{\medskipamount}   % BELOWSPACE, was \topsep
-    	{\slshape}  % BODYFONT--\slshape is defined to be \itshape with upright figures and punctuation
+    	{\thfamily}  % BODYFONT--\thfamily is italic with upright figures and punctuation
     	{}       % INDENT (empty value is the same as 0pt)
     	{\bfseries} % HEADFONT--you may want to add \tlfstyle so the number is tab lining, regardless of text figure selection
     	{.}         % HEADPUNCT
@@ -233,10 +235,29 @@
 %\zpl@figurestyle}
 %    \normalfont
 %\else
-    \AtEndPreamble{%
+\DeclareRobustCommand\thfamily % new family for theorem font
+        {\not@math@alphabet\thfamily\relax
+         \fontfamily\thdefault\selectfont}
+\DeclareRobustCommand{\textth}[1]{%
+  {\thfamily #1}%
+}
+\let\textthit\textth
+
+\AtEndPreamble{%
 \renewcommand*{\rmdefault}{zpl\zpl@figurealign%
 \zpl@figurestyle}
-    \normalfont}
+\def\zpl@thfigurestyle{\zpl@figurestyle}
+\ifx\zpl@figurestyle\zpl@dfltfigurestyle
+  \def\zpl@thfigurestyle{tlf}
+\else
+  \def\zpl@thfigurestyle{osf}
+\fi % there just two possible figure styles for the theorem font
+\newcommand*{\thdefault}{zplth-\zpl@thfigurestyle}
+\ifzpl@thrm
+    \theoremstyle{plain}
+    \patchcmd{\th@plain}{\itshape}{\thfamily}{\message{Replaced itshape by thfamily in theorem style plain.}}{\message{Unable to replace itshape by thfamily in theorem style plain.}}
+\fi
+\normalfont}
 %\fi
 
 \endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zpllf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zpllf.fd
index 56a56c47f1e..704a790a9b4 100644
--- a/Master/texmf-dist/tex/latex/newpx/ot1zpllf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zpllf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ot1zpllf.fd}[2015/01/19 v1.0 font definition file for OT1/zpl/lf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{OT1}{zpllf}{bx}{n}{<->ssub * zpllf/b/n}{}
 \DeclareFontShape{OT1}{zpllf}{bx}{scit}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{OT1}{zpllf}{bx}{it}{<->ssub * zpllf/b/it}{}
-\DeclareFontShape{OT1}{zpllf}{m}{sl}{<-> \zpl@scaled zpl-Italic-tlf-th-ot1}{}
-\DeclareFontShape{OT1}{zpllf}{b}{sl}{<->ssub * zpllf/b/it}{}
-\DeclareFontShape{OT1}{zpllf}{bx}{sl}{<->ssub * zpllf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{OT1}{zpllf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-lf-ot1}{}
+  \DeclareFontShape{OT1}{zpllf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-lf-ot1}{}
+  \DeclareFontShape{OT1}{zpllf}{bx}{sl}{<->ssub * zpllf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{OT1}{zpllf}{m}{sl}{<-> \zpl@scaled zplth-Italic-tlf-ot1}{}
+  \DeclareFontShape{OT1}{zpllf}{b}{sl}{<->ssub * zpllf/m/sl}{}
+  \DeclareFontShape{OT1}{zpllf}{bx}{sl}{<->ssub * zpllf/m/sl}{}
+\fi
 \DeclareFontShape{OT1}{zpllf}{b}{scsl}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{OT1}{zpllf}{bx}{scsl}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{OT1}{zpllf}{m}{scsl}{<->ssub * zpllf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zplosf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zplosf.fd
index 32eaebf0395..8a4858e69f9 100644
--- a/Master/texmf-dist/tex/latex/newpx/ot1zplosf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zplosf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ot1zplosf.fd}[2015/01/17 v1.0 font definition file for OT1/zpl/osf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{OT1}{zplosf}{bx}{n}{<->ssub * zplosf/b/n}{}
 \DeclareFontShape{OT1}{zplosf}{bx}{scit}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{OT1}{zplosf}{bx}{it}{<->ssub * zplosf/b/it}{}
-\DeclareFontShape{OT1}{zplosf}{m}{sl}{<-> \zpl@scaled zpl-Italic-osf-th-ot1}{}
-\DeclareFontShape{OT1}{zplosf}{b}{sl}{<->ssub * zplosf/b/it}{}
-\DeclareFontShape{OT1}{zplosf}{bx}{sl}{<->ssub * zplosf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{OT1}{zplosf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-osf-ot1}{}
+  \DeclareFontShape{OT1}{zplosf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-osf-ot1}{}
+  \DeclareFontShape{OT1}{zplosf}{bx}{sl}{<->ssub * zplosf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{OT1}{zplosf}{m}{sl}{<-> \zpl@scaled zplth-Italic-osf-ot1}{}
+  \DeclareFontShape{OT1}{zplosf}{b}{sl}{<->ssub * zplosf/m/sl}{}
+  \DeclareFontShape{OT1}{zplosf}{bx}{sl}{<->ssub * zplosf/m/sl}{}
+\fi
 \DeclareFontShape{OT1}{zplosf}{b}{scsl}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{OT1}{zplosf}{bx}{scsl}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{OT1}{zplosf}{m}{scsl}{<->ssub * zplosf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zplth-lf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zplth-lf.fd
new file mode 100644
index 00000000000..baf3d976c3a
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zplth-lf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ot1zplth-lf.fd}[2021/05/07 v1.0 font definition file for OT1/zplth/lf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{OT1}{zplth-lf}{\zpl@spacing}
+\DeclareFontShape{OT1}{zplth-lf}{m}{it}{<-> \zpl@scaled zplth-Italic-tlf-ot1}{}
+\DeclareFontShape{OT1}{zplth-lf}{m}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{m}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{m}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{b}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{bx}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{b}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{bx}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{b}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{bx}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{b}{it}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{bx}{it}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{m}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{b}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{bx}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{b}{scsl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{bx}{scsl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{OT1}{zplth-lf}{m}{scsl}{<->ssub * zplth-lf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zplth-osf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zplth-osf.fd
new file mode 100644
index 00000000000..3820d0718f1
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zplth-osf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ot1zplth-osf.fd}[2021/05/07 v1.0 font definition file for OT1/zplth/osf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{OT1}{zplth-osf}{\zpl@spacing}
+\DeclareFontShape{OT1}{zplth-osf}{m}{it}{<-> \zpl@scaled zplth-Italic-osf-ot1}{}
+\DeclareFontShape{OT1}{zplth-osf}{m}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{m}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{m}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{b}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{bx}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{b}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{bx}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{b}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{bx}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{b}{it}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{bx}{it}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{m}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{b}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{bx}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{b}{scsl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{bx}{scsl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{OT1}{zplth-osf}{m}{scsl}{<->ssub * zplth-osf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zplth-tlf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zplth-tlf.fd
new file mode 100644
index 00000000000..4a01d9b52dd
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zplth-tlf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ot1zplth-tlf.fd}[2021/05/06 v1.0 font definition file for OT1/zplth/tlf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{OT1}{zplth-tlf}{\zpl@spacing}
+\DeclareFontShape{OT1}{zplth-tlf}{m}{it}{<-> \zpl@scaled zplth-Italic-tlf-ot1}{}
+\DeclareFontShape{OT1}{zplth-tlf}{m}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{m}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{m}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{b}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{bx}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{b}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{bx}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{b}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{bx}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{b}{it}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{bx}{it}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{m}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{b}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{bx}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{b}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{bx}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tlf}{m}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zplth-tosf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zplth-tosf.fd
new file mode 100644
index 00000000000..a9e43d2069e
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zplth-tosf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{ot1zplth-tosf.fd}[2021/05/07 v1.0 font definition file for OT1/zplth/tosf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{OT1}{zplth-tosf}{\zpl@spacing}
+\DeclareFontShape{OT1}{zplth-tosf}{m}{it}{<-> \zpl@scaled zplth-Italic-osf-ot1}{}
+\DeclareFontShape{OT1}{zplth-tosf}{m}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{m}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{m}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{b}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{bx}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{b}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{bx}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{b}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{bx}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{b}{it}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{bx}{it}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{m}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{b}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{bx}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{b}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{bx}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{OT1}{zplth-tosf}{m}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zpltlf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zpltlf.fd
index 77d05bf29ef..780efce9ec2 100644
--- a/Master/texmf-dist/tex/latex/newpx/ot1zpltlf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zpltlf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ot1zpltlf.fd}[2015/01/17 v1.0 font definition file for OT1/zpl/tlf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{OT1}{zpltlf}{bx}{n}{<->ssub * zpltlf/b/n}{}
 \DeclareFontShape{OT1}{zpltlf}{bx}{scit}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{OT1}{zpltlf}{bx}{it}{<->ssub * zpltlf/b/it}{}
-\DeclareFontShape{OT1}{zpltlf}{m}{sl}{<-> \zpl@scaled zpl-Italic-tlf-th-ot1}{}
-\DeclareFontShape{OT1}{zpltlf}{b}{sl}{<->ssub * zpltlf/b/it}{}
-\DeclareFontShape{OT1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{OT1}{zpltlf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-tlf-ot1}{}
+  \DeclareFontShape{OT1}{zpltlf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-tlf-ot1}{}
+  \DeclareFontShape{OT1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{OT1}{zpltlf}{m}{sl}{<-> \zpl@scaled zplth-Italic-tlf-ot1}{}
+  \DeclareFontShape{OT1}{zpltlf}{b}{sl}{<->ssub * zpltlf/m/sl}{}
+  \DeclareFontShape{OT1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/m/sl}{}
+\fi
 \DeclareFontShape{OT1}{zpltlf}{b}{scsl}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{OT1}{zpltlf}{bx}{scsl}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{OT1}{zpltlf}{m}{scsl}{<->ssub * zpltlf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/ot1zpltosf.fd b/Master/texmf-dist/tex/latex/newpx/ot1zpltosf.fd
index 10d20d7491f..f1f68107bc2 100644
--- a/Master/texmf-dist/tex/latex/newpx/ot1zpltosf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/ot1zpltosf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{ot1zpltosf.fd}[2015/02/07 v1.0 font definition file for OT1/zpl/tosf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -23,9 +25,15 @@
 \DeclareFontShape{OT1}{zpltosf}{bx}{n}{<->ssub * zpltosf/b/n}{}
 \DeclareFontShape{OT1}{zpltosf}{bx}{scit}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{OT1}{zpltosf}{bx}{it}{<->ssub * zpltosf/b/it}{}
-\DeclareFontShape{OT1}{zpltosf}{m}{sl}{<-> \zpl@scaled zpl-Italic-osf-th-ot1}{}
-\DeclareFontShape{OT1}{zpltosf}{b}{sl}{<->ssub * zpltosf/b/it}{}
-\DeclareFontShape{OT1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{OT1}{zpltosf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-tosf-ot1}{}
+  \DeclareFontShape{OT1}{zpltosf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-tosf-ot1}{}
+  \DeclareFontShape{OT1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{OT1}{zpltosf}{m}{sl}{<-> \zpl@scaled zplth-Italic-osf-ot1}{}
+  \DeclareFontShape{OT1}{zpltosf}{b}{sl}{<->ssub * zpltosf/m/sl}{}
+  \DeclareFontShape{OT1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/m/sl}{}
+\fi
 \DeclareFontShape{OT1}{zpltosf}{b}{scsl}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{OT1}{zpltosf}{bx}{scsl}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{OT1}{zpltosf}{m}{scsl}{<->ssub * zpltosf/m/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zpllf.fd b/Master/texmf-dist/tex/latex/newpx/t1zpllf.fd
index 6c7a940b95f..5b3b07882f3 100644
--- a/Master/texmf-dist/tex/latex/newpx/t1zpllf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/t1zpllf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{t1zpllf.fd}[2015/01/17 v1.0 font definition file for T1/zpl/lf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{T1}{zpllf}{bx}{n}{<->ssub * zpllf/b/n}{}
 \DeclareFontShape{T1}{zpllf}{bx}{scit}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{T1}{zpllf}{bx}{it}{<->ssub * zpllf/b/it}{}
-\DeclareFontShape{T1}{zpllf}{m}{sl}{<-> \zpl@scaled zpl-Italic-tlf-th-t1}{}
-\DeclareFontShape{T1}{zpllf}{b}{sl}{<->ssub * zpllf/b/it}{}
-\DeclareFontShape{T1}{zpllf}{bx}{sl}{<->ssub * zpllf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{T1}{zpllf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-lf-t1}{}
+  \DeclareFontShape{T1}{zpllf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-lf-t1}{}
+  \DeclareFontShape{T1}{zpllf}{bx}{sl}{<->ssub * zpllf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{T1}{zpllf}{m}{sl}{<-> \zpl@scaled zplth-Italic-tlf-t1}{}
+  \DeclareFontShape{T1}{zpllf}{b}{sl}{<->ssub * zpllf/m/sl}{}
+  \DeclareFontShape{T1}{zpllf}{bx}{sl}{<->ssub * zpllf/m/sl}{}
+\fi
 \DeclareFontShape{T1}{zpllf}{b}{scsl}{<->ssub * zpllf/b/scit}{}
 \DeclareFontShape{T1}{zpllf}{m}{scsl}{<->ssub * zpllf/m/scit}{}
 \DeclareFontShape{T1}{zpllf}{b}{scsl}{<->ssub * zpllf/b/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zplosf.fd b/Master/texmf-dist/tex/latex/newpx/t1zplosf.fd
index b14ec1d85c1..c0685bab461 100644
--- a/Master/texmf-dist/tex/latex/newpx/t1zplosf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/t1zplosf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{t1zplosf.fd}[2015/01/17 v1.0 font definition file for T1/zpl/osf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -22,9 +24,15 @@
 \DeclareFontShape{T1}{zplosf}{bx}{n}{<->ssub * zplosf/b/n}{}
 \DeclareFontShape{T1}{zplosf}{bx}{scit}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{T1}{zplosf}{bx}{it}{<->ssub * zplosf/b/it}{}
-\DeclareFontShape{T1}{zplosf}{m}{sl}{<->\zpl@scaled zpl-Italic-osf-th-t1}{}
-\DeclareFontShape{T1}{zplosf}{b}{sl}{<->ssub * zplosf/b/it}{}
-\DeclareFontShape{T1}{zplosf}{bx}{sl}{<->ssub * zplosf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{T1}{zplosf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-osf-t1}{}
+  \DeclareFontShape{T1}{zplosf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-osf-t1}{}
+  \DeclareFontShape{T1}{zplosf}{bx}{sl}{<->ssub * zplosf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{T1}{zplosf}{m}{sl}{<-> \zpl@scaled zplth-Italic-osf-t1}{}
+  \DeclareFontShape{T1}{zplosf}{b}{sl}{<->ssub * zplosf/m/sl}{}
+  \DeclareFontShape{T1}{zplosf}{bx}{sl}{<->ssub * zplosf/m/sl}{}
+\fi
 \DeclareFontShape{T1}{zplosf}{b}{scsl}{<->ssub * zplosf/b/scit}{}
 \DeclareFontShape{T1}{zplosf}{m}{scsl}{<->ssub * zplosf/m/scit}{}
 \DeclareFontShape{T1}{zplosf}{bx}{scsl}{<->ssub * zplosf/b/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zplth-lf.fd b/Master/texmf-dist/tex/latex/newpx/t1zplth-lf.fd
new file mode 100644
index 00000000000..a2c23deb676
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/t1zplth-lf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{t1zplth-lf.fd}[2021/05/07 v1.0 font definition file for T1/zplth/lf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{T1}{zplth-lf}{\zpl@spacing}
+\DeclareFontShape{T1}{zplth-lf}{m}{it}{<-> \zpl@scaled zplth-Italic-tlf-t1}{}
+\DeclareFontShape{T1}{zplth-lf}{m}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{m}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{m}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{b}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{bx}{sc}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{b}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{bx}{n}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{b}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{bx}{scit}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{b}{it}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{bx}{it}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{m}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{b}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{bx}{sl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{b}{scsl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{bx}{scsl}{<->ssub * zplth-lf/m/it}{}
+\DeclareFontShape{T1}{zplth-lf}{m}{scsl}{<->ssub * zplth-lf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zplth-osf.fd b/Master/texmf-dist/tex/latex/newpx/t1zplth-osf.fd
new file mode 100644
index 00000000000..2235f54e27b
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/t1zplth-osf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{t1zplth-osf.fd}[2021/05/07 v1.0 font definition file for T1/zplth/osf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{T1}{zplth-osf}{\zpl@spacing}
+\DeclareFontShape{T1}{zplth-osf}{m}{it}{<-> \zpl@scaled zplth-Italic-osf-t1}{}
+\DeclareFontShape{T1}{zplth-osf}{m}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{m}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{m}{scit}{<-> ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{b}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{bx}{sc}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{b}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{bx}{n}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{b}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{bx}{scit}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{b}{it}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{bx}{it}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{m}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{b}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{bx}{sl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{b}{scsl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{bx}{scsl}{<->ssub * zplth-osf/m/it}{}
+\DeclareFontShape{T1}{zplth-osf}{m}{scsl}{<->ssub * zplth-osf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zplth-tlf.fd b/Master/texmf-dist/tex/latex/newpx/t1zplth-tlf.fd
new file mode 100644
index 00000000000..67420799777
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/t1zplth-tlf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{t1zplth-tlf.fd}[2021/05/06 v1.0 font definition file for T1/zplth/tlf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+
+\DeclareFontFamily{T1}{zplth-tlf}{\zpl@spacing}
+\DeclareFontShape{T1}{zplth-tlf}{m}{it}{<-> \zpl@scaled zplth-Italic-tlf-t1}{}
+\DeclareFontShape{T1}{zplth-tlf}{m}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{m}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{m}{scit}{<-> ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{b}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{bx}{sc}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{b}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{bx}{n}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{b}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{bx}{scit}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{b}{it}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{bx}{it}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{m}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{b}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{bx}{sl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{b}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{bx}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\DeclareFontShape{T1}{zplth-tlf}{m}{scsl}{<->ssub * zplth-tlf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zplth-tosf.fd b/Master/texmf-dist/tex/latex/newpx/t1zplth-tosf.fd
new file mode 100644
index 00000000000..880a7891109
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/newpx/t1zplth-tosf.fd
@@ -0,0 +1,28 @@
+\ProvidesFile{t1zplth-tosf.fd}[2021/05/07 v1.0 font definition file for T1/zplth/tosf]
+
+\expandafter\ifx\csname zpl@scaled\endcsname\relax
+  \let\zpl@scaled\@empty%
+\fi
+
+\ifdefined\zpl@spacing \else\global\let\zpl@spacing\@empty\fi
+%\traceon
+\DeclareFontFamily{T1}{zplth-tosf}{\zpl@spacing}
+\DeclareFontShape{T1}{zplth-tosf}{m}{it}{<-> \zpl@scaled zplth-Italic-osf-t1}{}
+\DeclareFontShape{T1}{zplth-tosf}{m}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{m}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{m}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{b}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{bx}{sc}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{b}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{bx}{n}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{b}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{bx}{scit}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{b}{it}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{bx}{it}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{m}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{b}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{bx}{sl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{b}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{bx}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\DeclareFontShape{T1}{zplth-tosf}{m}{scsl}{<->ssub * zplth-tosf/m/it}{}
+\endinput
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zpltlf.fd b/Master/texmf-dist/tex/latex/newpx/t1zpltlf.fd
index eb0d97b894d..2e00bce605d 100644
--- a/Master/texmf-dist/tex/latex/newpx/t1zpltlf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/t1zpltlf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{t1zpltlf.fd}[2015/01/17 v1.0 font definition file for T1/zpl/tlf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -21,9 +23,15 @@
 \DeclareFontShape{T1}{zpltlf}{bx}{n}{<->ssub * zpltlf/b/n}{}
 \DeclareFontShape{T1}{zpltlf}{bx}{scit}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{T1}{zpltlf}{bx}{it}{<->ssub * zpltlf/b/it}{}
-\DeclareFontShape{T1}{zpltlf}{m}{sl}{<-> \zpl@scaled zpl-Italic-tlf-th-t1}{}
-\DeclareFontShape{T1}{zpltlf}{b}{sl}{<->ssub * zpltlf/b/it}{}
-\DeclareFontShape{T1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{T1}{zpltlf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-tlf-t1}{}
+  \DeclareFontShape{T1}{zpltlf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-tlf-t1}{}
+  \DeclareFontShape{T1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{T1}{zpltlf}{m}{sl}{<-> \zpl@scaled zplth-Italic-tlf-t1}{}
+  \DeclareFontShape{T1}{zpltlf}{b}{sl}{<->ssub * zpltlf/m/sl}{}
+  \DeclareFontShape{T1}{zpltlf}{bx}{sl}{<->ssub * zpltlf/m/sl}{}
+\fi
 \DeclareFontShape{T1}{zpltlf}{b}{scsl}{<->ssub * zpltlf/b/scit}{}
 \DeclareFontShape{T1}{zpltlf}{m}{scsl}{<->ssub * zpltlf/m/scit}{}
 \DeclareFontShape{T1}{zpltlf}{bx}{scsl}{<->ssub * zpltlf/b/scit}{}
diff --git a/Master/texmf-dist/tex/latex/newpx/t1zpltosf.fd b/Master/texmf-dist/tex/latex/newpx/t1zpltosf.fd
index d800b5b7862..85009e16e67 100644
--- a/Master/texmf-dist/tex/latex/newpx/t1zpltosf.fd
+++ b/Master/texmf-dist/tex/latex/newpx/t1zpltosf.fd
@@ -1,5 +1,7 @@
 \ProvidesFile{t1zpltosf.fd}[2015/01/17 v1.0 font definition file for T1/zpl/tosf]
 
+\@ifundefined{ifzpl@sl}{\global\newif\ifzpl@sl\global\zpl@sltrue}{}
+
 \expandafter\ifx\csname zpl@scaled\endcsname\relax
   \global\let\zpl@scaled\@empty%
 \fi
@@ -23,9 +25,15 @@
 \DeclareFontShape{T1}{zpltosf}{bx}{n}{<->ssub * zpltosf/b/n}{}
 \DeclareFontShape{T1}{zpltosf}{bx}{scit}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{T1}{zpltosf}{bx}{it}{<->ssub * zpltosf/b/it}{}
-\DeclareFontShape{T1}{zpltosf}{m}{sl}{<->\zpl@scaled zpl-Italic-osf-th-t1}{}
-\DeclareFontShape{T1}{zpltosf}{b}{sl}{<->ssub * zpltosf/b/it}{}
-\DeclareFontShape{T1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/b/it}{}
+\ifzpl@sl % point to real slanted fonts
+  \DeclareFontShape{T1}{zpltosf}{m}{sl}{<-> \zpl@scaled zpl-Slanted-tosf-t1}{}
+  \DeclareFontShape{T1}{zpltosf}{b}{sl}{<-> \zpl@scaled zpl-BoldSlanted-tosf-t1}{}
+  \DeclareFontShape{T1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/b/sl}{}
+\else %point to theorem font
+  \DeclareFontShape{T1}{zpltosf}{m}{sl}{<-> \zpl@scaled zplth-Italic-osf-t1}{}
+  \DeclareFontShape{T1}{zpltosf}{b}{sl}{<->ssub * zpltosf/m/sl}{}
+  \DeclareFontShape{T1}{zpltosf}{bx}{sl}{<->ssub * zpltosf/m/sl}{}
+\fi
 \DeclareFontShape{T1}{zpltosf}{b}{scsl}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{T1}{zpltosf}{bx}{scsl}{<->ssub * zpltosf/b/scit}{}
 \DeclareFontShape{T1}{zpltosf}{m}{scsl}{<->ssub * zpltosf/m/scit}{}