Hi,   i am using this code to generate histogram plots by treatment and visit,  plots are generated but doesnt display the by variables(avisit/trtp) in each plot,  How to distinguish, any options that we can use to display that info?   proc corr data=final nomiss plots=matrix(histogram);    var HINE CI CMAP    by trtpn trtp avisitn avisit; run; ... View more