If you’re short of display territory and want to add more options, you have four to choose from.
Our Mac screen territory sometimes feels tight. Adding an extra display is an easy options with a cable or inexpensive adapter on many Macs, although limits apply, particularly with the 2020 and 2021 M1 Macs.
But there are four options for extending your desktop in different ways that can buy you a little to a lot additional territory—sometimes more display and sometimes more flexibility.
Sidecar
Apple added the option to use an iPad as a virtual display starting in macOS 10.15 Catalina. This featured, called Sidecar, extends your desktop. But it also lets you choose actions, like moving a window between a Mac-connected display and an iPad with a click or tap.
Apple supports Sidecar only with Macs released in the last five years or so, starting around the latest version of a Mac model introduced in 2016 or later. The Mac must have Catalina or later installed. Any iPad Pro model will work with Sidecar, as well as later series of other iPad styles. Read Apple’s requirements list for the full details.
Read more at MacWorld.com