Press {MENU} (center of joystick). Scroll to N, then press {SELECT}.
For
Handset LCD contrast (KX- TGA550 only)
You can adjust the handset display contrast. There are 6 levels.
1
2
3 Scroll to “LCD contrast”, then press {SELECT}.
4 Push the joystick up or down repeatedly to select the desired setting.
5 Press {SAVE}, then press {OFF}.
74For assistance, please visit http://www.panasonic.com/consumersupport