Using a laptop as a monitor for another computer allows you to not only mirror your computer's screen on the laptop but also extend it, meaning you can show different content on both screens.

If your gaming laptop screen feels too cramped, hook up an external monitor! Here's how to do it and what you need to know.

If you see the same thing on both displays, you should start by making sure the displays are Extended instead of Mirroring ...

A dual-monitor set-up can help to increase productivity, but what if your second screen isn't being detected? Here's what to try to fix the problem.

Changing your computer's refresh rate might fix the horizontal lines on the screen. Restarting both your monitor and computer can solve many screen issues, including horizontal lines.