added option for "Center for"

psipresentation.cls

@@ -12,6 +12,9 @@
 
 \institute{Paul Scherrer Institut PSI}
 
+\newcommand\centerfor[1]{\def\insertcenterfor{#1}}
+\let\insertcenterfor\empty
+
 \newcommand\location[1]{\def\insertlocation{#1}}
 \location{}
 
@@ -116,6 +119,10 @@ BoldItalicFont = *-Bold-Italic
 \newcommand{\yposauthor}{1.1}
 \newcommand{\yposlocationdate}{0.75}
 
+\newcommand{\centerforwidth}{0.195}
+\newcommand{\centerforleftedge}{0.208}
+\newcommand{\centerforupperedge}{0.8615}
+
 \colorlet{authorfont}{white}
 \colorlet{datefont}{white}
 
@@ -154,6 +161,15 @@ BoldItalicFont = *-Bold-Italic
       \includegraphics[width=\titlelogowidth\paperwidth]{psipresentation/imgs/logos/psi-logo-\logocolor}
     };
 
+    \ifx \insertcenterfor \empty \else
+      \node[inner sep=0pt, anchor=south west] (centerfortext) at (\centerforleftedge\paperwidth, \centerforupperedge\paperheight) {
+        \rlap{\fontsize{6}{6}\selectfont\textbf{\textcolor{titlefont}{%
+          \parbox[t]{\centerforwidth\paperwidth}{%
+            Center for \insertcenterfor%
+          }
+        }}}};
+      \fi
+
     %TODO: make the following a command?
 
     \node[inner sep=0pt, anchor=south] (titletext) at (\titletextleftedge\paperwidth, \ypostitle) {