Static zoom bar
Add an easily accessible zoom bar to the top of the notes page (instead of a popup). The popup is too small and disappears after a second or two. The zoom level should never go away.
When I am using my stylus on my chromebook, the writing isn't smooth when I am writing over my fingerprints that are on the screen because of my zooming in and out all the time. If I could zoom with my stylus, that would keep my fingerprints off the screen and make for a smoother writing experience.
juan andres commented
For easy acces to activate zoom, put a button in the bar