Currently, email folders in Proton Mail — both on the web app and Android app — are expanded by default.

When there are many folders, this makes the sidebar quite long and it becomes tedious to find the folder you actually need.

It would be very useful to have folders collapsed by default, or at least to have a setting that allows users to choose whether folders should be expanded or collapsed when opening the app.

This would make navigation much cleaner and faster, especially for users with many custom folders.