diff options
Diffstat (limited to 'macros/latex/contrib/beamer/base/beamerbasetwoscreens.sty')
-rw-r--r-- | macros/latex/contrib/beamer/base/beamerbasetwoscreens.sty | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/macros/latex/contrib/beamer/base/beamerbasetwoscreens.sty b/macros/latex/contrib/beamer/base/beamerbasetwoscreens.sty index af617d7ccc..89c4eb9f02 100644 --- a/macros/latex/contrib/beamer/base/beamerbasetwoscreens.sty +++ b/macros/latex/contrib/beamer/base/beamerbasetwoscreens.sty @@ -20,6 +20,13 @@ \defbeameroption{previous slide on second screen}[right]% {% + \ifx\@onlypreamble\@notprerr + \ltx@ifpackageloaded{pgfpages}{}{% + \ClassError{beamer}{`pgfpages' package necessary for this option}{}% + }% + \else% + \RequirePackage{pgfpages}% + \fi% \pgfpagesuselayout{two screens with lagging second}[second #1]% \beamer@twoscreenstexttrue \nofiles @@ -27,6 +34,13 @@ \defbeameroption{second mode text on second screen}[right]% {% + \ifx\@onlypreamble\@notprerr + \ltx@ifpackageloaded{pgfpages}{}{% + \ClassError{beamer}{`pgfpages' package necessary for this option}{}% + }% + \else% + \RequirePackage{pgfpages}% + \fi% \pgfpagesuselayout{two screens with optional second}[second #1]% \beamer@twoscreenstexttrue } |