Use the “Option” key (“Alt”) to set the source.
To c l o n e o u t t h e n a m e o n t h e t o m b s t o n e a b o v e , y o u w o u l d s e l e c t a s o u r c e
that shares the texture of the area you want to replace. In this case, the area
around the words provides an ample source of stone texture from which to
clone.
To begin, simply click on the preferred source area while holding down the
“Option” key (“Alt” on a PC). Then, with no keys held down, begin painting
over the area you want to replace. The image area from the source will be
transferred to the destination.
To be able to use this tool effectively, let’s look at the relevant settings.