You can save any image from a note as a file on your Mac.
Click the image to select it, then click the save icon in the Quick Formatting Toolbar.

Choose a location and the image will be saved as a standalone file.
Tips & Tricks
You can save any image from a note as a file on your Mac.
Click the image to select it, then click the save icon in the Quick Formatting Toolbar.

Choose a location and the image will be saved as a standalone file.