When you exit TM, and the desktop folder is on your desktop, under "View" click Show Toolbar. Then open TM and you'll see the sidebar in the desktop folder and you can choose what you want to see from there.
When you exit TM, and the desktop folder is on your desktop, under "View" click Show Toolbar. Then open TM and you'll see the sidebar in the desktop folder and you can choose what you want to see from there.