With Sidecar, you can extend the workspace of your Mac by using your iPad as a second display. The extended workspace allows you to use different apps on the different screens, or to use the same app across both screens, but control different aspects of it. For example, when you use the same app on both screens, you can view your artwork on your Mac while you use Apple Pencil and an app’s tools and palettes on iPad.
You can use Sidecar with your Mac and iPad.
You’re > System Preferences, then click Displays.
You can also connect your Mac and iPad using a USB cable. You can use the USB cable that came with your iPad or another cable that matches the ports on your Mac and iPad.
Click . Or tap one or more modifier keys, such as Control .
When you’re ready to stop using your iPad as a second display for your Mac, do one of the following:
On a Mac: Click Wi-Fi, Use an iPad as a second display for a Mac.