tikz-feynhand (20aug19)

git-svn-id: svn://tug.org/texlive/trunk@51915 c570f23f-e606-0410-a88d-b1316a301751

4 files changed, 128 insertions, 269 deletions

diff --git a/Master/texmf-dist/doc/latex/tikz-feynhand/README.md b/Master/texmf-dist/doc/latex/tikz-feynhand/README.md
index 7bbc79383ba..0f0b848fb6f 100644
--- a/Master/texmf-dist/doc/latex/tikz-feynhand/README.md
+++ b/Master/texmf-dist/doc/latex/tikz-feynhand/README.md
@@ -23,7 +23,7 @@ with many examples and a 5-minute introduction to TikZ.
 3. tikzfeynhand.keys.code.tex     - defines Tikz keys
 4. tikz-feynhand.userguide.pdf    - a userguide for the package
 5. tikz-feynhand.userguide.tex    - the tex source of the userguide
-6. changes.txt                    - lists changes applied to Tikz-Feynman to obtain Tikz-FeynHand
+6. changes.txt                    - lists changes since last version
 7. shell_escape.jpg               - a TexWorks screenshot for the userguide
 8. README.md                      - this file
 
@@ -32,7 +32,7 @@ with many examples and a 5-minute introduction to TikZ.
 LICENSE
 -------
 
-Copyright (C) 2018  Max Dohse
+Copyright (C) 2019  Max Dohse
 Copyright (C) 2016  Joshua Ellis
 
 This whole package (code and documentation)
diff --git a/Master/texmf-dist/doc/latex/tikz-feynhand/changes.txt b/Master/texmf-dist/doc/latex/tikz-feynhand/changes.txt
index 0b2d01e4c82..aad3cfddb78 100644
--- a/Master/texmf-dist/doc/latex/tikz-feynhand/changes.txt
+++ b/Master/texmf-dist/doc/latex/tikz-feynhand/changes.txt
@@ -1,281 +1,88 @@
 LIST OF CHANGES 
 
-by which this package tikz-feynhand (Version 1.0.0 of 2018/01/31) 
+by which this package tikz-feynhand (Version 1.1.0 of 2019/08/19) 
 which is available at https://ctan.org/pkg/tikz-feynhand
 
-was obtained from the original package tikz-feynman (Version 1.1.0 of 2016/02/05)
-which is available at https://ctan.org/pkg/tikz-feynman
+was obtained from Version 1.0.0
 
 ==========================================================================
 
-The LICENSE has been changed from LPPL to GNU General Public Licence v3.
-
-The changes are rather minor:
-any reference to LuaTex has been removed,
-the definitions that are unnecessary 
-for manual diagram creation have been removed,
-and some drawing styles have been added.
-
-In general, I REPLACED each occurence of the string "feynman" by "feynhand", 
-in order to avoid clashes when both packages are loaded simultaneously, 
-and most of these replacements are NOT listed individually below.
-Apart from that, the list below contains all changes to the best of my knowledge.
-
-The files tikzfeynman.patch.3.0.0.lua and tikzfeynman.patch.3.0.1.lua
-of the original package are not contained in the modified package,
-neither is the documentation of the original package.
-
-All file names and line numbers below refer to 
-the files of the original package tikz-feynman (Version 1.1.0 of 2016/02/05).
+All file names and line numbers below refer to the files of Version 1.1.0.
 
 ==============================================
-   FILE:   tikz-feynman.sty
+   FILE:   tikz-feynhand.sty
 
-+ general: package name changed
-+ line 32: removed \RequirePackage{ifluatex} 
++ no changes
 
 ==============================================
-   FILE:   tikzlibraryfeynman.code.tex
+   FILE:   tikzlibraryfeynhand.code.tex
 
-+ line 33: removed graphs,
-+ lines 38-48: removed \ifluatex ...
-+ lines 69-84: removed %Luatex warning ...
-+ lines 119-141: removed %% Override Lua ...
-+ line 159: removed \let\tikzfeynman@orig@graph=\graph
-+ lines 162+163: removed, inserted:
-       \let\propag=\tikzfeynhand@commands@propag
-       \let\propag=\propagator
-+ line 166: removed \tikz@lib@ignore@sizetrue
-+ lines 181-190: removed %% \feynmandiagram ...
-+ lines 266-282: removed %% Diagram ...
-+ lines 284-291: removed %% Graph ...
-       inserted:
-       %% Propagators
-       \newcommand{\tikzfeynhand@commands@propag}[1][]{\draw [#1]}
-+ line 321: removed \pgfkeyslet{/tikzfeynman/rmomentum/.@cmd}...
-+ line 327: removed \pgfkeyslet{/tikzfeynman/rmomentum'/.@cmd}...
-       inserted:
-       % short versions of momentum styles
-       \pgfkeyslet{/tikzfeynhand/rmomentum/.@cmd}{\tikzfeynhand@momentum@stdr}
-       \pgfkeyslet{/tikzfeynhand/rmomentum'/.@cmd}{\tikzfeynhand@momentum@stdrp}
++ line 228: inserted:
 
-       \pgfkeyslet{/tikzfeynhand/mom/.@cmd}{\tikzfeynhand@momentum@std}
-       \pgfkeyslet{/tikzfeynhand/mom'/.@cmd}{\tikzfeynhand@momentum@stdp}
+%% Slash
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\def\tikzfeynhand@slash{%
+  \pgfutil@ifnextchar[{\tikzfeynhand@key@opt{slash@@}}
+  {\tikzfeynhand@key@opt{slash@@}[]}}
+\pgfkeyslet{/tikzfeynhand/slash/.@cmd}{\tikzfeynhand@slash}
 
-       \pgfkeyslet{/tikzfeynhand/revmom/.@cmd}{\tikzfeynhand@momentum@stdr}
-       \pgfkeyslet{/tikzfeynhand/revmom'/.@cmd}{\tikzfeynhand@momentum@stdrp}
+%% Backslash
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\def\tikzfeynhand@backslash{%
+  \pgfutil@ifnextchar[{\tikzfeynhand@key@opt{backslash@@}}
+  {\tikzfeynhand@key@opt{backslash@@}[]}}
+\pgfkeyslet{/tikzfeynhand/backslash/.@cmd}{\tikzfeynhand@backslash}
 
 
 ==============================================
-   FILE:   tikzfeynman.keys.code.tex
-
-+ line 22: inserted
-       %% Lengths
-       \newlength{\feynhanddotsize}
-       \setlength{\feynhanddotsize}{1.5mm}
-
-       \newlength{\feynhandblobsize}
-       \setlength{\feynhandblobsize}{7.5mm}
-
-       \newlength{\feynhandlinesize}
-       \setlength{\feynhandlinesize}{0.5pt}
-
-       \newlength{\feynhandarrowsize}
-       \setlength{\feynhandarrowsize}{6pt}
-
-       \newlength{\feynhandtopsep}
-       \setlength{\feynhandtopsep}{18\feynhandlinesize}
-
-       %% Colors
-       \newcommand{\feynhandtopsepcolor}{white}
-
-
-+ line 117: replaced \pgfmetadecorationsegmentamplitude
-                  by 3 * \feynhandlinesize
-+ line 141: removed /tikzfeynman/medium,
-+ lines 145-206: removed   %% Diagrams ...
-+ line 219, 258, 280: 
-            each removed /tikz/graphs/as={},
-+ line 224: replaced /tikz/minimum size=1.5mm,
-                  by /tikz/minimum size=\feynhanddotsize,
-+ line 225, 264, 337, 348: 
-            each inserted /tikz/line width = \feynhandlinesize,
-+ lines 230-236: replaced every occurrence of square dot
-                           by squaredot
-+ lines 238-245: replaced every occurrence of empty dot
-                           by ringdot
-+ lines 230-236: replaced every occurrence of crossed dot
-                           by crossdot
-+ line 249: replaced /tikz/minimum size=3mm,
-                  by /tikz/minimum size=2\feynhanddotsize,
-+ line 260: replaced /tikz/fill=none,
-            by /tikz/fill,
-+ lines 261+275:
-            each replaced /tikz/outer sep=0.5\pgflinewidth,
-            by /tikz/outer sep={0.5*\the\feynhandlinesize},
-+ line 263: replaced /tikz/minimum size=0.75cm,
-            by     /tikz/minimum size=\feynhandblobsize,
-+ line 264: removed /tikz/pattern=north west lines,
-+ line 269: inserted /tikz/fill=black,
-+ line 270: inserted
-       every ringblob@@/.style={
-         },
-       every ringblob/.style={/tikzfeynhand/every ringblob@@/.append style={#1}},
-       ringblob/.style={
-         /tikzfeynhand/every blob@@,
-         /tikzfeynhand/every ringblob@@,
-         /tikz/fill=white,
-         },
-       every NWblob@@/.style={
-         },
-       every NWblob/.style={/tikzfeynhand/every NWblob@@/.append style={#1}},
-       NWblob/.style={
-         /tikzfeynhand/every blob@@,
-         /tikzfeynhand/every NWblob@@,
-         /tikz/fill=none,
-         /tikz/pattern=north west lines,
-         },
-       every NEblob@@/.style={
-         },
-       every NEblob/.style={/tikzfeynhand/every NEblob@@/.append style={#1}},
-       NEblob/.style={
-         /tikzfeynhand/every blob@@,
-         /tikzfeynhand/every NEblob@@,
-         /tikz/fill=none,
-         /tikz/pattern=north east lines,
-         },
-       every grayblob@@/.style={
-         },
-       every grayblob/.style={/tikzfeynhand/every grayblob@@/.append style={#1}},
-         grayblob/.style={
-         /tikzfeynhand/every blob@@,
-         /tikzfeynhand/every grayblob@@,
-         /tikz/fill=gray!50!white,
-         },
-+ line 288: replaced arrow size=1.5pt,
-                  by   arrow size=\feynhandarrowsize,
-+ line 295: replaced xshift...
-                  by xshift=-0.166666\feynhandarrowsize,
-+ line 297: replaced inner sep=\tikzfeynman@arrow@size,
-                  by inner sep=0mm,
-                       minimum width = \tikzfeynhand@arrow@size,
-+ line 309: replaced xshift... 
-                  by xshift=0.166666\feynhandarrowsize,
-+ line 316: replaced inner sep=\tikzfeynman@arrow@size,
-                  by inner sep=0mm,
-                       minimum width = \tikzfeynhand@arrow@size,
-+ line 343: inserted
-  every top@@/.style={
-    /tikz/preaction={draw=\feynhandtopsepcolor,line width=\feynhandtopsep} 
-  },
-  every top/.style={/tikzfeynhand/every top@@/.append style={#1}},
-  top/.style={
-    /tikzfeynhand/every top@@,
-  },
-
-+ lines 350-352: replaced amplitude= ...
-                           by amplitude=3\feynhandlinesize,
-                                segment length=7.5\feynhandlinesize,
-+ line 381: inserted /tikz/line width = \feynhandlinesize,
-+ lines 383-384: replaced amplitude= ...
-                           by amplitude=3\feynhandlinesize,
-                                segment length=7.5\feynhandlinesize,
-+ line 399: inserted /tikz/line width = \feynhandlinesize,
-+ line 435 replaced /tikz/thick,
-                 by /tikz/line width = 2\feynhandlinesize,
-+ line 442: inserted
-  every charged ghost@@/.style={
-    /tikz/draw=none,
-    /tikz/decoration={name=none},
+   FILE:   tikzfeynhand.keys.code.tex
+
++ line 629: inserted:
+
+  %% Slashes
+  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+  slash/.search also={/tikzfeynhand,/tikz},
+  %% Parameters
+  slash/size/.store in=\tikzfeynhand@slash@size,
+  slash/size=5\feynhandlinesize,
+  slash/style/.store in=\tikzfeynhand@slash@style,
+  slash/style={},
+  %% Styles
+  slash@@/.style args={[#1]#2}{
+    /tikz/line width = \feynhandlinesize,
+    /tikz/decoration={
+      markings,
+      mark=at position #2 with {
+        \tikzfeynhandset{slash/.cd,#1}
+        \draw [\tikzfeynhand@slash@style] (-\tikzfeynhand@slash@size, -2*\tikzfeynhand@slash@size) -- (\tikzfeynhand@slash@size, 2*\tikzfeynhand@slash@size);
+      },
+    },
     /tikz/postaction={
-      /tikzfeynhand/with arrow=0.5,
+      /tikz/decorate=true,
     },
   },
-  every charged ghost/.style={/tikzfeynhand/every charged ghost@@/.append style={#1}},
-  charged ghost/.style={
-    /tikzfeynhand/ghost,
-    /tikzfeynhand/every charged ghost@@,
-  },
-  every anti charged ghost@@/.style={
-    /tikz/draw=none,
-    /tikz/decoration={name=none},
+  slash@@/.default={[]0.5},
+  %%
+  %% Backslashes
+  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+  backslash/.search also={/tikzfeynhand,/tikz},
+  %% Parameters
+  backslash/size/.store in=\tikzfeynhand@backslash@size,
+  backslash/size=5\feynhandlinesize,
+  backslash/style/.store in=\tikzfeynhand@backslash@style,
+  backslash/style={},
+  %% Styles
+  backslash@@/.style args={[#1]#2}{
+    /tikz/line width = \feynhandlinesize,
+    /tikz/decoration={
+      markings,
+      mark=at position #2 with {
+        \tikzfeynhandset{backslash/.cd,#1}
+        \draw [\tikzfeynhand@backslash@style] (-\tikzfeynhand@backslash@size, 2*\tikzfeynhand@backslash@size) -- (\tikzfeynhand@backslash@size, -2*\tikzfeynhand@backslash@size);
+      },
+    },
     /tikz/postaction={
-      /tikzfeynhand/with reversed arrow=0.5,
+      /tikz/decorate=true,
     },
   },
-  every anti charged ghost/.style={/tikzfeynhand/every anti charged ghost@@/.append style={#1}},
-  anti charged ghost/.style={
-    /tikzfeynhand/ghost,
-    /tikzfeynhand/every anti charged scalar@@,
-  },
-
-+ line 447, 459, 473, 486, 497, 520: 
-            each inserted /tikz/line width = \feynhandlinesize,
-+ line 501: replaced segment length=1.5mm
-                  by amplitude=3\feynhandlinesize,
-                       segment length=8\feynhandlinesize
-+ line 510: inserted:
-  % short versions of style names
-  pho/.style={
-    /tikzfeynhand/photon,
-  },
-  bos/.style={
-    /tikzfeynhand/boson,
-  },
-  antbos/.style={
-    /tikzfeynhand/anti charged boson,
-  },
-  chabos/.style={
-    /tikzfeynhand/charged boson,
-  },
-  sca/.style={
-  	/tikzfeynhand/scalar,
-  },
-  chasca/.style={
-  	/tikzfeynhand/charged scalar,
-  },
-  antsca/.style={
-    /tikzfeynhand/anti charged scalar,
-  },
-  fer/.style={
-    /tikzfeynhand/fermion,
-  },
-  antfer/.style={
-    /tikzfeynhand/anti fermion,
-  },
-  gho/.style={
-    /tikzfeynhand/ghost,
-  },
-  chagho/.style={
-    /tikzfeynhand/charged ghost,
-  },
-  antgho/.style={
-    /tikzfeynhand/anti charged ghost,
-  },
-  glu/.style={
-    /tikzfeynhand/gluon,
-  },
-  maj/.style={
-    /tikzfeynhand/majorana,
-  },
-  antmaj/.style={
-    /tikzfeynhand/anti majorana,
-  },
-
-+ line 515: replaced insertion/size=3pt,
-            by insertion/size=5\feynhandlinesize,
-+ line 541: replaced momentum/arrow distance=3mm,
-                  by momentum/arrow distance={\the\feynhandarrowsize},
-+ line 548: inserted
-       momentum/arrow thickness/.store in=\tikzfeynhand@momentum@arrow@thickness,
-       momentum/arrow thickness={0.64*\the\feynhandlinesize},
-       momentum/arrow size/.store in=\tikzfeynhand@momentum@arrow@size,
-       momentum/arrow size={0.8*\the\feynhandarrowsize},
-+ lines 559, 573, 592, 613, 627, 646, 667, 681, 700, 721, 736, 756: 
-                  each replaced \draw [-Stealth, \tikzfeynman@momentum@arrow@style]
-                  by \draw [-{Stealth[length=\tikzfeynhand@momentum@arrow@size]},
-          	                     line width=\tikzfeynhand@momentum@arrow@thickness, 
-                                \tikzfeynhand@momentum@arrow@style]
-+ lines 772+776: each removed /tikz/looseness=1.5,
-+ lines 786-814: removed %% Graceful ...
-
+  backslash@@/.default={[]0.5},
diff --git a/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.pdf b/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.pdf
index 93389973c0d..29351270113 100644
--- a/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.pdf
+++ b/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.pdf
diff --git a/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.tex b/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.tex
index ba00d93810f..25de1e773e6 100644
--- a/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.tex
+++ b/Master/texmf-dist/doc/latex/tikz-feynhand/tikz-feynhand.userguide.tex
@@ -2,7 +2,7 @@
 %
 % TikZ-FeynHand
 % Feynman Diagrams with TikZ (LaTex manual version)
-% Copyright (C) 2018 Max Dohse
+% Copyright (C) 2019 Max Dohse
 %
 % available at https://ctan.org/pkg/tikz-feynhand
 %
@@ -116,7 +116,7 @@
 %
 \hrule
 \vspace{3mm}
-{\centering\Large\bfseries Quick Reference\\}
+{\centering\Large\bfseries Quick Reference\vspace{-2mm}\\}
 %
 \noindent
 \textbf{Environment}\\
@@ -158,13 +158,13 @@ analogue:
 \blucol\verb!\feynhandblobsize, \feynhandlinesize, \feynhandarrowsize, \feynhandtopsep!\txcol\\
 \blucol\verb!\renewcommand{\feynhandtopsepcolor}{COLOR}!\txcol\\
 \blucol\verb!\tikzfeynhandset{every STYLE={/tikz/color=COLOR},}!\txcol\\
-\vspace{1mm}
+\vspace{0mm}
 %
 % =====================================================================
 \hrule
 \vspace{2mm}
 
-{\centering Version 1.0.0 - 
+{\centering Version 1.1.0 - 
  available at\qquad  \texttt{https://ctan.org/pkg/tikz-feynhand}\\}
 
 \vspace{1mm}
@@ -172,6 +172,7 @@ analogue:
 \hrule
 % =====   TABEL OF CONTENTS   ===========================================
 %
+\vspace{-2mm}
 \tableofcontents
 %
 % =====================================================================
@@ -1334,7 +1335,7 @@ as in the following example.
 \end{minipage}
 %
 % --------------------------------------------------------------------------------
-\newpage\subsubsection{Keys: In, Out, Looseness, Left/Right, Half/Quarter}
+\subsubsection{Keys: In, Out, Looseness, Left/Right, Half/Quarter}
 \label{sec:_feynmandiagrams_keysinoutetc}
 %
 \noindent
@@ -1441,7 +1442,7 @@ with respect to the line's direction.
 %
 % --------------------------------------------------------------------------------
 \vspace{-6mm}
-\subsubsection{Propagator labels and momentum arrows}
+\newpage\subsubsection{Propagator labels and momentum arrows}
 \label{sec:_feynmandiagrams_proplabelsmomentum}
 %
 \noindent
@@ -1562,10 +1563,57 @@ at which the insertion marks are drawn.
    \end{feynhand}
 \end{tikzpicture}
 \end{minipage}
+%
+% -------------------------------------------------------------------------------------------------------
+\vspace{-3mm}
+\subsubsection{Slashes and backslashes}
+\label{sec:_feynmandiagrams_propagators_slashes}
+%
+\noindent
+Back/slashes work like insertions:
+\\
+%
+\begin{minipage}{0.83\linewidth}
+\vercol\begin{verbatim}
+  \vertex [dot] (a1) at (0,0) {};   \vertex [dot] (a2) at (2,0) {};
+  \propag [chabos, red, slash=0.25, slash=0.75] (a1) to (a2);
+\end{verbatim}\txcol
+\end{minipage}
+%
+\begin{minipage}{0.16\linewidth}
+\tikzsetnextfilename{propag_slash_1}
+%\tikzset{external/force remake}
+\begin{tikzpicture}
+   \begin{feynhand}
+  \vertex [dot] (a1) at (0,0) {};
+  \vertex [dot] (a2) at (2,0) {};
+  \propag [chabos, red, slash=0.25, slash=0.75] (a1) to (a2);
+  \end{feynhand}
+\end{tikzpicture}
+\end{minipage}
+\\
+\begin{minipage}{0.83\linewidth}
+\vercol\begin{verbatim}
+  \vertex [ringdot] (a1) at (0,0) {};   \vertex [ringdot] (a2) at (2,0) {};
+  \propag [chabos, red, backslash={[size=6pt,style=Green]0.25}] (a1) to (a2);
+\end{verbatim}\txcol
+\end{minipage}
+%
+\begin{minipage}{0.16\linewidth}
+\tikzsetnextfilename{propag_slash_2}
+%\tikzset{external/force remake}
+\begin{tikzpicture}
+   \begin{feynhand}
+  \vertex [ringdot] (a1) at (0,0) {};
+  \vertex [ringdot] (a2) at (2,0) {};
+  \propag [chabos, red, backslash={[size=6pt,style=Green]0.25}] (a1) to (a2);
+   \end{feynhand}
+\end{tikzpicture}
+\end{minipage}
 
 %
 % -------------------------------------------------------------------------------------------------------
-\subsubsection{Crossing propagators (one on top of the other)}
+\newpage\subsubsection{Crossing propagators (one on top of the other)}
 \label{sec:_feynmandiagrams_propagators_top}
 %
 \noindent
@@ -1584,7 +1632,7 @@ respectively \blucol\verb$with reversed arrow=VALUE$\txcol for antiparticles.
 \blucol\verb$VALUE$\txcol must be a number between 0 and 1,
 and indicates the fraction of propagator length at which TikZ inserts the arrow.
 The default value of \blucol\verb$VALUE$\txcol is 0.5.
-\vspace{2mm}\\
+\vspace{-1mm}\\
 %
 \begin{minipage}{0.8\linewidth}
 \blucol\begin{verbatim}
@@ -1607,6 +1655,7 @@ The default value of \blucol\verb$VALUE$\txcol is 0.5.
    \end{feynhand}
 \end{tikzpicture}
 \end{minipage}
+\vspace{-5mm}
 \\
 %
 \begin{minipage}{0.8\linewidth}
@@ -1629,6 +1678,7 @@ The default value of \blucol\verb$VALUE$\txcol is 0.5.
    \end{feynhand}
 \end{tikzpicture}
 \end{minipage}
+\vspace{-3mm}
 %
 %
 % =====================================================================
@@ -1749,7 +1799,8 @@ Same diagram (same TikZ/FeynHand code) drawn after setting:
 \setlength{\feynhandarrowsize}{6pt}
 \setlength{\feynhandtopsep}{18\feynhandlinesize}
 \renewcommand{\feynhandtopsepcolor}{white}
-%
+\vspace{-4mm}
+\\
 The color of a vertex/propagator style can be set for all subsequent diagrams
 in the current local Tex group (e.g. document or equation, figure, minipage environment) 
 by the command \vercol\verb$\tikzfeynhandset$\txcol with the key \vercol\verb$every$\txcol:
@@ -1764,6 +1815,7 @@ by the command \vercol\verb$\tikzfeynhandset$\txcol with the key \vercol\verb$ev
 % =====================================================================
 % =====     APPENDICES     ============================================
 %
+%\newpage
 \appendix
 %	
 \section{TikZ Basics}
@@ -2049,7 +2101,7 @@ This should look somewhat like Figure~\ref{Fig:_shell_escape}.
 %
 \begin{figure}
 	\centering
-	\includegraphics[width=0.75\linewidth]{shell_escape.jpg}
+	\includegraphics[width=0.7\linewidth]{shell_escape.jpg}
 	\caption{TexWorks screenshot.}
 	\label{Fig:_shell_escape}
 \end{figure}