Apple Macintosh Performa 577 - Manual (Page 136)

Adjustments Video - 15
White Balance
Note:
Perform the cutoff
and white balance
adjustments after the
monitor has been on for at
least 10 minutes.
1 Use Display Service
Utility to display the
Gray Bars test pattern.
2 Press the Contrast Up
button and set screen
contrast to maximum.
Gray Bars
Contrast Up Button