I’m having some trouble with my external mouse and Google Chrome. The zoom functionality available by holding the CTRL key and scrolling the mouse wheel is working in extreme increments.
The slightest scroll of the wheel will either max the zoom out to 1000% or reduce it to 10% if I have the CTRL key held down. I haven’t been able to find the reason, but I just learned that hitting CTRL + 0 defaults the zoom to 100% (or whatever your default zoom is, in Chrome Settings). Great tip!