First, make use of the existing fonts of the computer.

1. Create a document.

2. Type the required text.

3. Delete the background layer.

4. Store in PNG format.

Second, use a signature written on physical paper.

1. Sign the paper.

2. Shoot with a digital camera and send it to the computer.

3. Open the picture in PS.

4. Select-Color Range-Select the color of the text-Adjust parameters-OK.

5. Copy and paste.

6. Delete the background layer.

7. Store in PNG format.