1. Any image or selected portion of an image can be used to make a brush. In this case I made a rectangular selection around the cat. Since brushes are only shades of gray, I chose to convert the selection to b&w to see how it might appear. I made some b&w adjustments to increase contrast. The background could be erased or masked so that only the cat shape would be created in the brush. A better "graphic" style brush could be created by posterizing the image into a low number of tonal values. The brush values vary from opaque where black to transparent where white.
2. Go to the Edit menu and select Define brush. Name the brush and click OK. The brush will appear as the last item in the brush menu.
3. Select the new brush, then open the Brush palette.
4. To utilize this brush as a picture or texture, as apposed to a "painting" brush, increase the spacing until the images don't overlap.
5. Now the brush can be used to print single images without a blurring overlap. In this example, I held down the mouse button and drew along the yellow path.
Brushes of images or symbols can work great for watermarking photos, adding textures, etc. Each click of the mouse will paint a sharp single image.