[Feature]: zoom of the notebook

### In which process do you want a new feature?

Something else

### Feature / Improvement

I use the app more and more these days. It works great. Today, I shared screen with the notebook at the meeting, and realized that I cannot zoom in to make the screen bigger like I would do with the browser.

It would be fantastic to add the regular `Ctrl+monsewheel` or `Ctrl++` functionality

### Version

0.0.2