Document Tabs command (View menu)
Use this command to display and hide the Document Tabs, which offers quick access to all open documents. Switching between documents is much easier with clicking Document Tabs than pressing Ctrl+Tab key multiple times. A check mark appears next to the menu item when the Document Tabs is displayed.
To change the location of the Document Tabs, right click the Document Tabs and choose 'Options' command on the popup menu.
See Document Tabs for help on using the Document Tabs.
Shortcuts
Toolbar:
Keys: Alt+Shift+3