Thanks, Dan, for this pointer. After a few attempts I have managed to get the data tips to show up using the html output destination for a relatively small heat map (about 600 cells). It appears the default number of data tips is set to 500 but this can be overridden with tipmax in an ODS graphics statement. My actual project has about 120,000 cells and although SAS seemed to generate the html file just fine, my browser didn't seem to want to load it ... fortunately I was distracted and left it 'spin' for a while and after about 12 minutes Chrome finally brought the image up (the file is about 15M in size) and the data tips worked as hoped. In summary the HTML variable in an annotate data set used with GSLIDE does the trick. I had tried searches before I posted my question but apparently did not manage the right sequence of terms as this solution did not occur so I am very appreciative of your quick and accurate response. Curt
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