AASTRA 7433ip for MX-ONE User Guide EN - Manual (Page 89)

IP P HONE FOR MX-ONE™
89 6/1553-DBC 433 01 Uen D 2012-02-22
2. Select Display and press Select.
3. Scroll to Phone Contrast and press Select.
4. Press the navigation keys, or the volume keys, to increase or
decrease the contrast to a desired level.
5. Press Set and then Yes to confirm.
Your setting is saved.