Use this method if you’re using two monitors and want to rearrange them and set the secondary monitor as your primary display.

If you’re not sure which display is which, click one of the displays, and then click the Identify button. This makes a “1” or “2” appear at the bottom-left corner of each monitor. If you make any changes, click Apply to save them.

If the checkbox is already checked, this monitor is already your primary display. To change the primary display to a different monitor, click that monitor at the top, and then check the box next to “Make this my main display” once selected.

For example, if you’re using a laptop plugged in to a docking station, just use your laptop monitor and unplug your external monitor(s).

Double-click HKEY_LOCAL_MACHINE in the left panel. Double-click the System folder beneath that. Double-click the CurrentControlSet folder beneath that. Double-click the Control folder beneath that. Double-click the GraphicsDrivers folder beneath that.

Double-click HKEY_LOCAL_MACHINE in the left panel. Double-click the System folder beneath that. Double-click the CurrentControlSet folder beneath that. Double-click the Control folder beneath that. Double-click the GraphicsDrivers folder beneath that.

Right-click the “Configuration” folder in the left panel. Click Rename. Type Configuration. old. Press Enter. If anything goes wrong later (it shouldn’t), you can always return here and rename the new “Configuration. old” folder to “Configuration” to restore your previous settings.

Right-click the Connectivity folder in the left panel. Click Rename. Type Connectivity. old. Press Enter. As with the last step, if anything goes wrong with your settings, you can return here and rename the new “Connectivity. old” folder to “Connectivity” to restore your settings.

If you’re using a laptop, the built-in monitor will always be Monitor 1. If you have multiple video cards, there’s no surefire way to know which is the primary other than simply trying the reverse order. Do not plug in your second monitor yet.

If you’re using a laptop, the built-in monitor will always be Monitor 1. If you have multiple video cards, there’s no surefire way to know which is the primary other than simply trying the reverse order. Do not plug in your second monitor yet.

If you don’t see the second (and/or third) monitor in the Display Settings window, click the Detect button under “Multiple displays” to detect it now. Windows has automatically recreated the registry entries you renamed earlier, so there’s no need to return to the registry.