fix: better handout watermark

Author: cmeesters

slides/Snakemake_HPC_User_Creator_Combi.tex

@@ -21,15 +21,20 @@
 \subtitle{<+++ if course.subtitle is defined +++><++course.subtitle++><+++else+++>Programming and Deployment<+++endif+++> - <++course.edition++>\newline by <++instructor.name++>} 
 
 \ifdefined\ishandout
-\usepackage{background}
-\backgroundsetup{
-	placement=center,
-	angle=30,
-	scale=1,
-	contents={\footnodesize Handout from Snakemake Teaching Alliance by <++instructor.name++>},
-	opacity=1
+\AddToHook{shipout/foreground}{
+	\begin{tikzpicture}[remember picture,overlay]
+		\node[red,rotate=10,scale=1,opacity=0.7] at (current page.center) {\footnotesize Handout from Snakemake Teaching Alliance by <++instructor.name++>}; 
+	\end{tikzpicture}
 }
-\setbeamertemplate{background}{\BgMaterial}
+%\usepackage{background}
+%\backgroundsetup{
+%	placement=center,
+%	angle=30,
+%	scale=1,
+%	contents={\footnotesize Handout from Snakemake Teaching Alliance by <++instructor.name++>},
+%	opacity=1
+%}
+%\setbeamertemplate{background}{\BgMaterial}
 \fi
 
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