Toggle-tab mode

When you have Zotero open if you click on the ‘Toggle Tab Mode” button (see image below, the one with the arrow pointing right), your Zotero session opens in a new tab instead of opening up as a pane at the bottom of your screen. Click that button again to exit the tab mode and return to bottom-of-screen view.

You can also toggle back and forth between the pane & tab modes by: CTRL+ALT+F.