Are there hotkeys to zoom in and out?
Yes, on Mac I use [Cmd]+ / [Cmd]- to zoom in and out. I’m not sure what the equivalent key on Windows is but it does exist. It is very fast to quickly check things before pressing [Cmd]0 to return to standard zoom. But it’s Browser zoom not Bubble zoom so is not very usable until you return to normal.
If it’s a quick check you are looking for that should work. If you are looking for hot keys for Bubbles own zoom, a great idea BTW, then you should post it in @fayewatson thread for ideas, or Zeroqodes ideas app, wherever it is that Bubble now refer to for their Hackathon ideas.