Type J to bring up the Spot Healing Brush.
The Spot Healing Brush is by far the simplest cloning tool in Photoshop.
With little to no experience, you can repair small areas of an image. The
secret to using the tool is in the name: Spot Healing. The tool is intended
not for large areas of replacement, but rather to remove little unwanted
spots, such as a scratch on an old photograph or a mole on a person’s face.
To u s e t h e t o o l , s i m p l y h o v e r o v e r t h e a r e a y o u w a n t t o r e p l a c e a n d c l i c k
once. Photoshop does all the work by examining the pixel data around the
spot and seamlessly integrating the data into the destination.