Many times I accidentally hold down control key then use my mouse wheel in an attempt to scroll my opened file. What ends up happening is the font sizes all change in EmEditor. The issue here is that I can find no easy way to restore the font sizes back to what they were originally. There is no undo for this mistake. I have done this so many times and find it 100% annoying.
Do you have an option to restore font sizes back to the way they were? An alternative is to disable this mouse scrollbar zoom feature. I find it totally useless and would never in a million years ever use this. For some applications it may make sense (like a web browser). Many text editors all share this. Notepad++ does it too, but it at least has an option to View|Zoom|Restore Default Zoom.