Garmin GNC 300XL TSO - Manual (Page 116)

106
SECTION
7
UNIT SETTINGS
Display Settings
To change the display contrast settings:
1. Press and hold
M
and rotate
O
to show the ‘Display’ settings page.
2. Press
C
twice and use
K
to select ‘auto’ or ‘manual’ control.
3. Press E .
4. If ‘manual’ is selected, use K to set the display contrast level. (If ‘auto’ is selected you may
also change the offset level to your preference.)
5. Press
C
to complete.
The ‘mode’ selection allows you to display on-screen characters as black on a light
green background (positive) or light green on a black background (negative). With the
‘auto’ setting the photocell selects the best mode for day or night viewing.
To change the display mode settings:
1. Press and hold M , and rotate O to show the ‘Display’ settings page.
2. Press
C
twice and use
O
to highlight the ‘mode’ field.
3. Rotate
K
to select ‘pstv’, ‘ngtv’ or ‘auto’.
4. If ‘auto’ is selected, rotate O to highlight the threshold level, and use K to select the level
at which the display will switch from positive to negative for night time use. (Note: Some
experimentation may be necessary to obtain the desired response level.)
Setting the display mode to ‘negative’ will display
on-screen characters as light green on a black
background. This setting is suitable for night
operation.
The display contrast may be set to automatically
adjust to varying lighting conditions, using the
built-in photocell.
300xl manual 1/25/99 2:36 PM Page 106