Raymarine C140w User Reference Handbook page 215

5. Select the YES option to perform the reset, or select the NO
option to abort.
Performing a settings and data reset
Performing a settings and data reset erases ALL waypoints,
routes, and track data from your multifunction display.
BEFORE proceeding with a settings and data reset, ensure
that you backup any data that you want to keep on to a
CompactFlash card.
1. Press the MENU button.
2. Using the trackpad, highlight the System Setup menu item, then
press the trackpad right to select it.
3. Using the trackpad, highlight the Settings and Data Reset menu
item, then press the trackpad right to select it.
4. If you have password-protected your waypoints, enter your
waypoint password and press the OK button.
5. Select the YES option to perform the reset, or select the NO
option to abort.
Maintaining your display
215