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Using the GPSMAP 278 Keypad
IN Key/OUT Key
• Press to adjust map scale to show a larger area
with less detail (zoom out) or a smaller area with
more detail (zoom in).
PAGE/MODE Key
• Press to cycle through main pages in sequence and
exit a submenu page.
• Press and hold to switch between Marine and
Automotive modes.
QUIT Key
• Press to cycle through main pages in reverse
sequence, revert to the previous value in a data
entry eld, or cancel an unintended function.
ENTER/MARK Key
• Press to select a highlighted option.
• Press and hold to mark your current location as a
waypoint.
NAV/MOB Key
• Press to show the navigation menu.
• In Marine Mode, press and hold to activate the
MOB function.
In Automotive Mode, press and hold to show the
Next Turn page and announce the next turn when
using the external speaker.
MENU Key
• Press to open the options menu for the current page.
• Press twice to open the Main Menu.
POWER Key
• Press and hold to turn the unit on or off.
• Press and release to adjust the backlighting and
external speaker volume.
ROCKER
• Press up, down, left, or right to highlight options
and to enter data, or use to pan the arrow on the
Map Page.
FIND Key
• Press to quickly search for and access user
waypoints, cities, and other items used for
navigation.
GPSMAP 278 Owner’s Manual 7
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