Lowrance HDS Gen2 Touch Operator's Manual page 32

Photo transparency
The Photo transparency sets the opaqueness of the photo overlay.
With minimum transparency settings the chart details will be almost
hidden by the photo.
Minimum transparency Maximum transparency
Depth range (highlighting)
Allows user to specify a range of depths to be highlighted. Depths
will be rounded to the closest contour interval available. The
maximum depth range value must be greater than the minimum
depth range value.
Shallow water highlighting
Displays pink dots for Shallow areas up to a 30-foot range.
Navionics Fish'n Chip
This unit supports Navionics Fish'n Chip (US only) chart feature.
For more information, see www.navionics.com.
Change to Lowrance
Switches map display from Navionics to Lowrance mapping data.
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Chart | Lowrance HDS Gen2 Touch