Like Sidecar and other Continuity features, the new Continuity Sketch and Markup tether an iOS 13 or iPadOS 13 mobile device to a Catalina Mac using Apple Wireless Direct Link (AWDL).

You can draw on an iPad with an Apple Pencil on the Procreate app, which you can use to sketch, paint, and illustrate.

At the Apple Store in Arlington, Va., for example, you can go on a “Sketch Walk,” in which you’re urged to bring an iPad Pro and (the Pencil accessory) to sketch the people, places and ...