The main tool is ps, and the specific method is. Design your signature in black letters on a white background. If you have a scanner, scan it into the computer. If you don't have a mobile phone, take a photo with a digital camera. Put it in the computer and turn on the ps. Use the magic wand, click on the white background, and then right-click-select reverse selection. At this time, add your favorite color and dig out your signature. Then put it on the photo you want. Finally, does the landlord know how to use ps?