fullscreen – How to avoid Zoom from going full screen?

These days we have to use Zoom meeting from time to time for work. Zoom has the annoying habit of going full screen when someone shares their screen. Apparently on other operating systems it is possible to change this behaviour in the preferences, but I can’t find any Preferences for Zoom on Ubuntu (18.04).

Is there a way to find these Preferences? Or is there a way to block Zoom doing this from the Ubuntu side?