Again, tap the toggle next to Mirror iPhone. Simply drag your cursor to the edge of one screen in the direction of the other monitor, and the cursor will automatically move to the other screen. In the next menu, tap the toggle next to Mirror iPhone to disable it. The arrangement of your monitors will allow you to easily move your mouse cursor between the screens. Depending on how you've physically set them up, you may even want to drag one monitor icon on top of the other.
You can also choose your monitors' arrangement here, including which is on the left and right.
This will allow you to display different windows on both monitors, which can help improve your productivity. You may have to use a different keyboard shortcut and as usual you have to choose one that isn't already assigned in any application that has focus when pressed.
Uncheck Mirror Displays to extend the desktop to the second monitor instead. In past versions of OSX you can toggle between mirror displays (if you have more than one monitor) and extend displays with the keyboard shortcut (Command + F1). Note that the keyboard shortcut F, which worked under OS X 10.8.5, conflicted with a system default keyboard shortcut under macOS 10.12.5, macOS 10.13.3 and why I changed it. Open System Preferences, go to Displays, then select the Arrangement tab. Make Yourself at Home by Arranging Your Monitorsīy default, macOS will usually configure your second monitor to show the same exact contents as the first, which is known as "mirroring." This is handy if you're showing a presentation to a group of people, but isn't useful if you want more room for your windows.