I noticed that lots of
expression evaluation popups datatips severely slow down going in and out of debugging, so I'd like to delete most of them (for that I need to find them first, is there a button for that?) or if it's not an option, delete all of them at once.
If you're asking about the immediate window, you have to right click in it and click
These are called "DataTips" and you can find options to manipulate them in the
Menu > Debug and there you will find
Clear All DataTips,
Import DataTips etc... When you're actively debugging you can find an extra option to clear DataTips per file.
Hope this helps!