Continuity Sketch and Continuity Markup on your Mac
With Continuity Sketch, you can use your nearby iPhone or iPad to draw a sketch and instantly insert it into a document on your Mac—for example, in an email, a message, a document, or a note. Or use Continuity Markup to edit a document using your finger on an iOS device or with Apple Pencil on an iPad, and see those markups on your Mac.
Note: To use Continuity Sketch and Continuity Markup, you need an iPhone or iPod touch with iOS 13 (or later) or an iPad with iPadOS 13.1 (or later). Make sure you’re signed in with the same Apple ID on all the devices, and that they have Wi-Fi and Bluetooth turned on. Pressure and tilt for Apple Pencil work only in apps with advanced stylus support.
Insert a sketch. In an app like Mail, Notes, or Messages, position the pointer where you want to insert a sketch. Choose File (or Insert) > Import from iPhone or iPad, then choose Add Sketch. On your iOS device or iPad, draw a sketch using your finger or Apple Pencil (on an iPad that supports it), then tap Done. On your Mac, the sketch appears where you positioned the pointer. Depending on where the sketch is inserted, you can mark it up, enlarge it, and so on.
Mark up a document. With Continuity Markup, you can use a nearby iPad 
or iPhone/iPod touch 
to mark up PDFs, screenshots, and images, and see the results on your Mac. Press and hold the Space bar to view the document in Quick Look, then click the device icon. If both devices are nearby, click Annotate 
, then choose a device. The tool may appear highlighted to show your device is connected.
Start writing, drawing, or adding shapes with your finger or Apple Pencil (on an iPad that supports it). See the updates live on your Mac as you make them on your iPad, iPhone, or iPod touch.
Learn more. See Insert sketches with Continuity Sketch in the macOS User Guide and the Apple Support article Use Markup on your iPhone, iPad, or iPod touch.