Garmin Personal Navigator GPS 45XL Owner's Manual & Reference page 50

Reference
System Setup
12/24 Hour Clock
To display the time in
AM/PM format, select the
12 hour option from the
'hours' field.
Screen Backlighting
To get the longest battery
life, keep the screen back-
lighting at the default 15
second option.
46
Time Format
The time display shown on the system setup and posi-
tion pages may be set to display the time in a 12-or 24-
hour format.
To select the time format:
1. Highlight the 'HOURS' field and press the
2. Select 12-or 24-hour display, and press
Screen Contrast
The GPS 45XL features adjustable screen contrast and is
controlled by using an on-screen bar scale.
To set the screen contrast:
1. Move the field highlight to the 'CONTRAST' field and press
E
the key.
L
2. Use the and
desired contrast and press the
Screen Backlighting
The screen backlight timer is adjustable for
0, 15, 30, 60, 120 and 240 seconds. The '0' setting will
keep backlighting on continuously. Whenever backlighting
is on, a bulb icon will appear on the status page.
To set the backlight timer:
1. Highlight the 'LIGHT' field and press the
U
2. Use the and
the desired setting, and press
3. To turn lighting on and off, press
Tone Setting
You may choose from three settings for audible tone:
messages only, messages and keystrokes, or no tone at all.
To specify a tone setting:
1. Highlight the 'TONE' field and press the
U
2. Use the and
E
press .
R
keys to adjust the bar scale for the
E
key.
D
keys to toggle through and select
E
.
B
briefly.
D
keys to select the desired tone and
E
key.
E
to confirm.
E
key.
E
key.