Multi-Purpose - Raymarine L750 Operating Handbook

54
See Fig. 3-17. Using the up- and down-controls on the Trackpad, you
can move this line up or down to match the depth of the object you are
checking. The entry for "VRM Depth" will change to indicate the depth
shown by the VRM line. The VRM will not operate if any Soft Keys other
than the four default keys are displayed.

Multi-purpose

This button allows you to adjust the contrast and backlighting level used
for the display. These are the same controls which appear when you
first turn the unit on. By using the Multi-purpose button, you can reach
these controls at any time. When you press the Multi button, the unit
presents the two Soft Keys shown in Fig. 3-18.
Lamp
This sets the brightness of the lamp which provides "backlighting"
for the display area. The same setting also controls the brightness
of the lighting used for the keys. You can increase or decrease the
brightness by pressing the Soft Key then using the up- and down-
controls on the Trackpad. Pressing the Lamp key several times will
toggle the lamp between full on and off. It is not necessary to use
the Trackpad to do this.
Contrast
This entry controls the difference in brightness between the lightest
and darkest parts of the display area. Again, you can increase or
decrease the contrast by pressing the Soft Key, then using the up-
and down-controls on the Trackpad.
By choosing the extreme settings, it is possible to make the display
area completely light or completely dark, so that it cannot be read.
If this happens, you can reset the whole unit to the factory default
settings. Turn the unit on by pressing the Power button and the
Enter button at the same time.
Fig. 3-18 Multi-Purpose Soft Keys
L750 Fishfinder: Installation and Operation Handbook