I OSX 10.28 som jag sitter med nu så finns det just en sådan knapp vore konstigt om dom helt har tagit bort den i 10.3
The Video mirroring feature is 'plug and play'. Simply connect the Apple VGA Display Adapter to the mini-VGA port located on the back of the computer. Then connect your external VGA monitor to the Apple VGA Display Adapter, and turn it on. When connecting the Apple VGA Display Adapter to the computer, the screen may refresh for an instant as the computer reconfigures for video output.
You can use any VGA monitor that is compatible with these resolutions and frequencies:
Resolution (in pixels)
Vertical Scan Frequency
640 by 480
138 Hz
800 by 600
112 Hz
1024 by 768
89 Hz
1152 by 864
80 Hz
1280 by 960
72 Hz
You can switch resolutions and frequencies in the Displays pane of System Preferences (Mac OS X), or in the Monitors control panel (Mac OS 9).
For connecting displays that use another type of connector other than VGA, or require a resolution and frequency that is not compatible with the eMac, you can use a third-party scan converter in conjunction with the Apple VGA Display Adapter. To learn which scan converters are available for Macintosh systems, see the Macintosh Products Guide (http://guide.apple.com) for the latest devices.
DVD Player for Mac OS X and Mac OS 9 can play a DVD-Video disc on a display using external video mirroring. The DVD will automatically play on the external VGA display connected to the Apple VGA Display Adapter.
Important: The Apple VGA Display Adapter (M8639G/A) should not be confused with the Apple Video Adapter (M8734G/A). The Apple Video Adapter (M8734G/A) is not compatible with the eMac computer's mini-VGA monitor port.