This happens to me as well. I will get my Index window set up with number, entry, subentry, sub-sub, and page range columns. Then, if I do a search in the Index window, when I return to no filters, all the columns show again, and I have to right-click and hide the ones I don’t want. It’s a small issue, just a few clicks, but it would be nice if the Index window remembered my column choices after a search. This is on a Mac.
And thank you Klarso for putting up forums for us!