Annotate images in TextEdit on Mac
If you add an image to your document, you can use Markup to add shapes, text and callouts to it within TextEdit. You can even draw on your image using your trackpad.
In the TextEdit app
on your Mac, move your pointer over an image, click the Markup pop-up menu 
, then choose Markup.If you don’t see the pop-up menu, you may need to enable Markup. Choose Apple menu
> System Preferences, click Extensions, click Actions, then select the Markup tickbox.Use the tools in the toolbar to mark up the image (or use the Touch Bar).
Sketch
Sketch a shape using a single stroke.
If your drawing is recognised as a standard shape, it’s replaced by that shape; to use your drawing instead, choose it from the palette that’s shown.
Draw
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 computers with a Force Touch trackpad.
Shapes
Click a shape, then drag it where you want. To resize the shape, use the blue handles. If it has green handles, use them to alter the shape.
You can zoom and highlight shapes using these tools:
Zoom
: Drag the lens where you want. To increase or decrease the zoom, drag the green handle; drag the blue handle to change the lens size. Highlight
: Drag the highlight where you want. To resize it, use the blue handles.
Text
Type your text, then drag the text box where you want.
Sign
If signatures are listed, click one, then drag it where you want. To resize it, use the blue handles.
To create a new signature:
Using your trackpad: Click Trackpad, click the text as prompted, sign your name on the trackpad using your finger, then click Done. If you don’t like the results, click Clear then try again.
If your trackpad supports it, press your finger more firmly on the trackpad to sign with a heavier, darker line.
Using your computer’s built-in camera: Click Camera. Hold your signature (on white paper) facing the camera so that your signature is level with the blue line in the window. When your signature appears in the window, click Done. If you don’t like the results, click Clear then try again.
Shape Style
Change the thickness and type of lines used in a shape, and add a shadow.
Border Colour
Change the colour of the lines used in a shape.
Fill Colour
Change the colour that’s used inside a shape.
Text Style
Change the font or the font style and colour.
Rotate Right
Rotate the item to the right. Continue clicking to keep rotating.
Rotate Left
Rotate the item to the left. Continue clicking to keep rotating.
Crop
Hide part of an image or document. 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.
Click Done.