Garmin 555 GPS Receiver User Manual


 
48 GPSMAP 400/500 Series Owner’s Manual
Using Sonar
Zoom—zoom in to a section of the full screen. The zoom is off, or
set to No Zoom by default. Four options are available:
No Zoom—turns zooming off.
2x Zoom—twice the magnication.
4x Zoom—four times the magnication.
Bottom Lock
—locks the zoom window to the bottom.
Split Zoom—displays the Split Zoom screen (page 45).
Depth Line
—quickly reference a specic depth (Show or Hide). To
set the depth of the reference line, select Show, and then press up or
down on the Rocker.