Eagle 640c 用户指南

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Sonar Page (left). Sonar Page zoomed 2X (center).

Sonar Page zoomed 4X (right).

Zoom Pan

Your unit has the handy ability to quickly zoom in on any portion of the
water column. Zoom Pan lets you rapidly move the zoomed area up and
down the display. By pointing your zoom at different portions of the
chart as it scrolls, you can get  a close-up look at structure or cover below
you.

To use Zoom Pan, you will have to turn off Auto Depth Range. To do
this, press 

and select Auto Depth Range. Press 

 to uncheck

the box next to it, then press 

|

 and use 

↑ 

↓

to pan up and down

the water column. Press 

 to return the display to the normal Zoom

range.