Annotate Your Image

As you can see in the image below, there are several ways that you can annotate your images.

When you are more familiar with Preview, you can play around with the various Tools and see just what they can do.

Add Arrows, Lines and Text

But for now I am going to show you how to add Arrows, Lines and Text to your image.

When you click on Arrow or Line, it will immediately appear in your image, as shown below.

You can then move it to where you want it, and adjust the length of it, and also change the colour.

If you make a mistake, just hit delete. But be sure not to click anywhere else in the meantime, or you will not be able to delete it nor edit it further in any way.

In the image above, the green arrow has blue dots at either end of it. That means that it is still in editing mode, and I could move it, adjust its size or change its colour if I wished