I would like to put two sets of geometry lines in my .inp file and be able to select one or the other set, without removing either of them. I realize I can simply comment out the set I do not want to use, but this gets unwieldy when there are a lot of lines.
Question: Is there a way to put some kind of “brackets” around the set of lines that I would like to (maybe temporarily) ignore in my .inp file?
Thanks, Ralph