Applies to 2018.1 Update and later
Displays a list of all open drawings and the layouts in the selected drawing.
QUICKVIEW (Command)
File Tab:

The following options are displayed.
Displays a list of all open drawings.
Double-clicking a thumbnail sets that drawing current. You can also right-click a thumbnail to display a shortcut menu of additional file management options. The following items are on the Drawing shortcut menu:
Displays a list of all layouts in the selected drawing.
Double-clicking a thumbnail switches to that layout. You can also right-click a thumbnail to display a shortcut menu of additional layout management options. The following items are on the Layout shortcut menu: