If I am working on a problem or reading a note and want to come back to it later, where can I find it?

All the problems that you click on can be easily found again in your recent problems. Problems and problems that you are fond of can also saved (using the ••• menu in the corner of each problem) and then easily referenced via the "Saved" tab in the main menu.

Currently, problems can only be saved from the Brilliant site, and not from the mobile app.