Ahh - ok... If you want the graph to be vary large (tall), you can set the ypixels to a large value, and then experiment with the width (bar width), space (space between bars) and gspace (space between groups) until you get values where SAS does not complain about overlapping (in the log). But with extremely tall sas/graphs, there is typically a lot of space wasted at the top & bottom of the graph.  (Perhaps someone other than me knows a 'trick' around this?) axis1 label=(f="Arial/Bold" "Standardized Intensity"); axis2 label=none; axis3 label=none; title1 "Test"; goptions ypixels=4000; proc gchart data=show_problem; where Gene_ID = "Test"; hbar id / type=sum sumvar=intensity group=cat patternid=group NOZERO legend=legend1 nostats raxis=axis1 maxis=axis2 gaxis=axis3 space=0 gspace=.15 width=.18 coutline=black ; run; ... View more