Alpine X701D/INE-W997D Owner's Manual page 124

Delete the next waypoint or the whole route.
The following options are also available on many of the menu screens:
Button Function
Tap the Menu button to return to the main menu.
Check those notifications that contain important information but do not
require immediate action from the users. If there are no notifications,
this icon is not displayed.
The More button appears on the screen to display additional features.
Tap it to open the list of additional features on certain screens.
Tap the Back button to return to the previous screen. You can also
press and hold this button to quickly return to the Navigation view from
any other screen.