Down Imaging™ Sensitivity; Freeze Frame And Active Cursor - Humminbird 561 Operation Manual

Down Imaging™ Sensitivity
Use Imaging Sensitivity to control how the sonar returns appear on the
display. Increase the sensitivity to reveal weaker returns that may be of interest,
especially in very clear water or greater depths. Decrease the Imaging
Sensitivity to eliminate the clutter from the display that is sometimes present
in murky or muddy water. See Down Imaging™ X-Press™ Menu: Imaging
Sensitivity or Down Imaging™ Sensitivity for more information.

Freeze Frame and Active Cursor

Freeze Frame and Active Cursor - Press any arrow on the 4-WAY Cursor
Control key, and the screen will freeze and a cursor will be displayed. Use the
4-WAY Cursor Control key to move the cursor over a sonar return, and the depth
of the sonar return will be displayed in the cursor dialog box.
16 What's on the Down Imaging™ Display