Windows user here. I often use [CTRL+mouse] wheel to change zoom in the browser, globally. In chrome a pop-up message box appears when I do this that shows the current zoom level and a button to "reset to default". In the editor, I found you have to have focus on the right side-bar for this to work On the same note, when focused on the editor/map use [ALT+mouse wheel] to change the zoom level of the map and [SHIFT+mouse wheel] to scroll horizontally, and a bonus use [E+mouse wheel] on a token\image to rotate. Cheers