Photoshop

How to add a signature to your images in Photoshop

1.Sign with a black pen on a white sheet of paper and either scan your signature into Photoshop at 300ppi or just take a photograph of it making sure your writing is in focus
2. Once that signature is in Photoshop: Open the levels palette in Photoshop (Image > Adjustments > Levels) and drag the left (black) slider to the right and the right (white) slider to the left until the writing is pure black and the paper is pure white.
3. Take the rectangular marquee tool and make a selection around your signature
4. Edit > Define brush preset > Save the brush as your signature
5. Open the image you want to add your signature to > create a new layer > select the colour you want to have by double clicking the foreground colour swatch > search for your brush under the brush presets and add your signature. Using the backet keys [ or ] allows you to alter the brush size.
6. You can now lower the opacity of the signature layer or even add some layer blending effects. These effects could be save as an action for later use.