AASTRA 4422 IP Office (SIP) for MX-ONE User Guide - Manual (Page 78)

Settings
Dialog 4422 IP Office 78
Display contrast
The display contrast can be changed.
Change the contrast on the display
Settings
Ô
Press.
ì
Press.
Repeat until the
Display Contrast menu is framed.
Press.
The display shows:
ì
Press to decrease or increase the contrast.
Note: The Clear key can be used to leave the menu without
saving the changes.
Press to store the contrast level.
Press to return to the previous menu,
or
Settings
Х Ф
press to return to idle mode.
Display Contrast