Brightness control panel

The Brightness control panel was developed by Apple Computer for use by the Macintosh Classic and backlit Macintosh Portable.

Usage
Included with System 6.0.7 and 7.0.x, its sole purpose is to set the brightness of the screen, or to dim it, on early Macintosh models without a physical brightness switch. Any attempt to use this control panel on any other model will result in an error message and the control panel will not open.

History
This functionality was included as part of the Portable control panel 1.3 for earlier versions of System 6. In System 7.1, the Brightness control panel was superseded by the Screen control panel for newer models with built-in color screens.