diff --git a/ptbposter/tcb-example1.tex b/ptbposter/tcb-example1.tex
index 06a270caf85b2662c4a5fb5c9d4db1de49b0db10..299beb47f7b551256366b1c01f7107c81594fe73 100644
--- a/ptbposter/tcb-example1.tex
+++ b/ptbposter/tcb-example1.tex
@@ -19,7 +19,7 @@
 %\logo{Logo754.pdf}
 
 \colorlet{boxBackground}{black!5}
-\posterSet{showframe=true}
+\posterSet{showframe=true,columns=3,rows=5}% columns,rows -> default 
 
 \title{Poster-Test (\texttt{tcolorbox}) -- Nr.~1}