If the pop-up menu isn’t shown, you may need to enable Markup. Choose Apple menu
Draw a shape using a single stroke. Press your finger more firmly on the trackpad to draw with a heavier, darker line.
This tool appears only on Mac computers with a Force Touch trackpad.
Shapes
Type your text, then drag the text box where you want.
Highlight Selection
Change the thickness and type of lines used in a shape, and add a shadow.
Border Color or Rotate Right
Hide part of an item. Drag the corner handles until just the area you want to keep is shown within the frame’s border. You can also drag the frame to reposition it. When you’re ready, click Crop.
Image Description , , then choose a device. The tool may appear highlighted to show your device is connected. To disconnect your device without using it, click the tool again.
Note: To use your nearby iPhone or iPad to sign or annotate items, it must meet Continuity system requirements. See the Apple Support article Create and use email signatures in Mail on Mac