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Laptop Video Projection
Article: 000016a


Mirroring vs. Extending:
Many laptops can both "mirror" (same image is displayed on the computer screen and on the external projector), and "extend" (two screens together make one larger "virtual" screen).


Most instructors set their computers to the mirroring mode for classroom presentations.

Computer/OS TypeHow to Switch Display Modes for Projection
Dell Latitude CPi (Windows 2000) Holding down the blue "Fn" key while hitting the F8 key toggles between internal only, mirror display, and external (projector) only modes.
Other Windows laptops (not OS specific) There are many other key combinations that trigger video setup. Try these links for detailed information on each manufacturer:
      InFocus Laptop Computer video Port Activation Chart
          or
      Extron Keyboard Commands for Laptop Computers
Mac laptops running OS 8x/9x If control strip is present, click on monitor item and select appropriate mode (mirroring, usually), or select the Apple (top left), pull down to Control Panels, select Monitors, then make sure the "Mirroring" mode is checked in that window.

Note: putting computer to sleep and waking it back up will usually auto-sense and set monitor modes correctly as well.
iBook laptops running OSX (10.2 or later) Plugging in an external projector should automatically switch to mirroring mode. Putting the unit to sleep and then waking it up should also accomplish monitor sensing and switching.

Otherwise, select the Apple (top left), pull down to system preferences, then select Monitors. Make sure monitors are set to Mirroring, or turn internal off to get different resolution on projector.
PowerBook laptops running OSX (10.2 or later) Plugging in monitor should automatically cause system to switch to EXTENDING the desktop, with the projector being the extension without the presence of a menu bar at top.

To switch to Mirroring or move the menu bar to the projector screen: Select the Apple (top left), select System Preferences, then from there select Monitors. Click the Arrange item in the selection bar, and check the "Mirroring" checkbox at the bottom, or drag and arrange the monitor setup and menu bar in that screen as desired.



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