Humminbird LCR 400 ID Operation Manual page 19

USING THE LCR400ID
OPERATING THE LCR400ID
BOTTOM LOCK
5. Using Bottom-Lock;
Factory Setting: OFF
Bottom-lock provides an up-close view like Zoom, except
that in this case the zoomed view automatically moves
up or down to stay on the bottom. To use this feature,
select BTM LOCK and press ON-OFF. The range of the
display is shown when Bottom-Lock is on.
This is an ideal feature for finding structure or Iocating
fish near the bottom.
Remember: If Bottom-Lock is the last function selected,
you can use the ON-OFF button to switch Bottom-Lock
on and off without having to press SELECT first.
DISPLAY SPEED
6. Setting Display Speed;
Factory Setting: One level below maximum
The LCR 400ID display is "updated" (advances across
the screen) as you move through the water. The speed
at which the display is updated depends on the Display
Speed setting. To adjust it, select SPEED, and press
the Up arrow for a faster setting or the Down arrow for a
slower setting.
In general, higher Display Speed settings provide faster
updates, while slower Display Speeds provide more
detailed information.