windows 2000 & Latr :1. Right-click on your desktop. 2. Choose Properties from the pop-up menu, then choose the Settings tab. 3. Use slider bar to change the resolution.

Mac OS X :1. From the Apple menu select System Preferences, then select Displays. 2. Within the "Display" tab, click on the "Detect Display" button. This will do a scan of the monitor information and list the resolutions supported by this monitor. 3. Choose your desired resolution.