How do you connect two monitors to one computer?
If you have a Windows computer, see if your current video card can support dual monitors. (Read Microsoft Knowledge Base article 182708 at support.microsoft.com.) If it can’t, buy a monitor switch box and connect both monitors to it. Or buy a new video card that has dual monitor ports. If it can, buy and install a second video card. Read “How to Install a Video Card,” for installation instructions. Reboot the computer. Set preferences for your new monitor in the Display control panel under System Preferences (Macintosh) or in the Display control panel (Windows).