For Windows PCs:

1. Click the Start button, and select Settings, then Control Panel.
2. Double-click on the Display icon to open the Display Properties Window.
3. Click on the Settings tab, and in the Screen area section, adjust the slide bar to read "800 by 600 pixels."

For Macs:

1. Click the Apple Icon, and select Control Panel, then Monitors to open the Monitors Control Panel.
2. In the Resolution section, click on "800 by 600."