Turns on and off the device when held.

Adjusts the backlight and color mode when quickly pressed and released.

Zooms out of a chart or view.

Zooms in to a chart or view.

Scrolls, highlights options, and moves the cursor.

Acknowledges messages and selects options.

Returns to the previous screen.

Saves the present location as a waypoint.

Returns to the Home screen.

Opens a menu of options for the page

Closes a menu, when applicable.