Furuno Felcom 250 Operator's Manual page 22

1. BASIC OPERATION
4. In the selected menu, press
key to open the item. Or press the corresponding number key for that item. The
item screen appears. As an example, the [Font size] menu is shown below.
5. Press
the one below appears for three seconds.
6. Press
1-8
and to select an item then press the Enter key. A pop-up window like
to close the menu.
or to choose a menu item, and press the Enter