
You can choose to mirror, or duplicate, your desktop on all displays.
After you connect an additional monitor, you can use the New Display Detected dialog box to indicate how you want you’re desktop to appear on the monitor's display. Choose the appearance of additional displays. Open Display Settings by clicking the Start button, clicking Control Panel, clicking Appearance and Personalization, clicking Personalization, and then clicking Display Settings. To select different display settings at any time, open Display Settings in Control Panel.