I would love to have a toggle to activate something like a "zen mode". If toggled, there should be nothing except for the paper and a floating toolbar with selected tools only. The user has complete control over which tools to use here. For example, I never use stickers, so this would not be in my toolbar. However, I regularly switch between a blue ballpoint, a black ballpoint, a green brush and a red brush pen. These alongside with the eraser and lasso tool would be in my "Zen Floating Toolbar".
Additionally, it would be very helpful to customize the already existing tool bar to each owns needs. E.g. more colours than just three, but instead remove stickers and camera. I have added a Draft of the Idea to the attachements