Make an Image into a Brush
If you come across an image you like or an image pack of brushes, this tutorial shows you how to make them into a brush.
1. Open the image you’d like to make into a brush. Mine is below.
2. Go to Edit - Define Brush. Once you click define brush, you can name it. And click OK.
3. After that, the brush will be in with the brushes.
Tip! If you have multiple brushes like in an image pack, you can use the polygonal selector tool and select around the desired brush and go through the same steps. Here's an example below.