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lets you rapidly move the zoomed area up and down to different depths.
By "pointing" your zoom at different portions of the chart as it scrolls,
you can get a good, close-up look at structure or cover below you.
To use Zoom Pan, switch to a manual depth Range setting (see page 50)
and turn on 2X or 4X Zoom. Then, simply press ↑ or
↓ to pan up and
down the water column.