General
Settings gathers the few things that belong to RobinPad and not to your painting: the language, the name of your notebook, the session and the button that erases your work. Each block has its own help.
Language
The interface language. It's detected automatically and you can change it here.
Document
Your notebook's title, the name that appears on its cover. It takes up to 60 characters; if you leave it empty, "Untitled".
Session
A look at the current state: the page proportions, the screen sharpness, the extra working space and the undo and redo steps you have left. Everything is saved on your computer: if you clear your browsing data, it's gone.
Reset
This is where the Clear all pages and layers button is, which empties the painted pages of this notebook.
The page format is kept, your style is not touched and the other notebooks are not affected either. But the painted work does disappear, and it cannot be undone. Export if you have something in progress.