Apple Macintosh Performa 5400 Series - Manual (Page 38)

Using the screen control buttons on your computer
You can adjust the level of light and dark on the screen of your built-in
monitor by using the screen control buttons on your computer (marked with
the ¸ icon).
m Press the button on the right to lighten your screen.
m Press the button on the left to darken your screen.
You can also use the Monitors & Sound control panel, in the Control
Panels folder in the Apple (K) menu, to control the level of light and dark
on the screen. You can also use this control panel to adjust the resolution
and color depth displayed on your monitor. For more information, see the
“Monitors (standard settings)” topic of Macintosh Guide, available in the
Guide (h) menu.
Screen control buttons
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37 Expanding Your Computer and Using Special Features