I found in the IDL help how to enable code folding, which I've done, but I just want to fold about 50 lines of comments (version n-1 of the code I'm changing). The little - in the left column only is automatically guessing about three lines of those 50 to fold (basically the lines in my comments that were already commented :). How can I select lines to fold and have that just happen? This is one of those examples where the IDL/ENVI help is just so lacking - tells you that something can be done and then not how to do it. Tell me what I'm missing, please...