The Sidebar contains a number of tabs, and this is a short rundown of them.

Sidebar

Text Chat

Where you chat and dice rolls are displayed.

For organizing your uploaded or marketplace-bought art assets.

Character Sheets, Journals and Handouts are found here.

If a Compendium is selected for the game, you can access and search it from this tab.

Organizing and managing your music.

All the miscellaneous settings