Select a few lines in a file, then press ctrl-r : this opens the 'Replace text' dialog. The 'Text to find' textfield is the expression you want to replace. This expression should be found in the lines you selected (or the whole file if you didn't select anything). It would be very cool to have a "completion" textfield there that propose a list of words while you're typing. The words would only be the ones that are in the selection (ordered by number of occurences in the selection). This is not a huge feature, but little details like this make a difference They save a few typing. It should not be too difficult to implement (imho) and produce a nice effect on people seeing Idea for the first time.