Create custom brush in Adobe Photoshop
1. Go to File>>New and select the size of the new document. (I have taken 640x480 in Web Document, with transparent background (Background Content: Transparent).
2. Create your image, that u want to make as a Brush (I have just chosen my name).
3. When u finished your image work then crop the content area by using Crop Tool.

4. Now go to Edit Menu and click on Define Brush Preset and type your brush name, click on OK.
5. Now in your Brush Preset menu a brush has been added as you chose your brush name.

6. If you want to save your brush for the future reference then in the brush preset click on the Arrow which is situated in the top right of the pan and go to Save Brushes.

7. If you want to add a created brush then you can add it just by double clicking on it then the brush will automatically added in your Brush Preset or you can add it by clicking on load Brushes and select the brush.
