When reassigning collection numbers it tells you how many were changed, but doesn't physically change them until you click ok. It would be nice if at this point it gave a summary or preview of what the change will be, and then you can either apply the change or discard it.

This would be helpful when reassigning because since you can only do so much limiting to the reassigning and can't block collection numbers, its sometimes trial and error to get the reassign to work the way you want. and the only way to currently redo it is to backup before hand and then restore if it didn't do what you wated (which could be time consuming on large collections and if you can't get the change quite right)

-Agrare