PowerPoint - How to Turn on dual monitor support?

Before you can turn on dual monitor support (sometimes called multiple monitor support), you must have the proper hardware installed according to the manufacturer's instructions. Dual monitor support is available for desktop computers running Microsoft Windows 2000 with Service Pack 3 or later, and laptop computers running Microsoft Windows XP.

1. If Control Panel is not already visible, click the Start menu, point to Settings, click Control Panel, and then double-click the Display icon.
2. On the Settings tab, select the monitor icon for the presenter's monitor (usually 1), and then select the Use this device as the primary monitor check box. If this check box is selected and unavailable, the monitor is already designated as the primary monitor. Only one monitor can be selected as the primary monitor at a time. When you select a different monitor icon and complete step 2, this setting for the previous monitor is automatically cleared and becomes accessible again.
   
3. Select the secondary monitor icon, and then select the Extend my Windows Desktop onto this monitor check box.

Notes

• You can only show the presenter view on one monitor and run the slide show from the other monitor.
• Your computer may have the capability to support multiple monitors, but PowerPoint supports the use of two for a slide show.
• You can turn off dual monitor support by selecting the second monitor and then clearing the Extend my Windows Desktop onto this monitor check box.