Add, remove, rename, save, and load shelves.
The shelf menu appears when you click the
icon in the title bar, or when you right-click anywhere on the title bar.

menu on the Shelves window title bar.
-drag the shelf tab and drop it on the trash can icon.
and double-click the shelf title tab.Choose Save shelf set from the
menu on the Shelves window title bar.
The shelf set name appears at the bottom of the menu and can be selected to replace the current shelf set at any time.
Do one of the following
menu on the Shelves window title bar.
menu on the Shelves window title bar, and select the corresponding .scm file in the browser.
menu on the Shelves window title bar.
.