I am having a problem using the patch tool in Photoshop CS5. I click on the Patch Tool and select the Source option from the upper tool bar. Then I circle a gray area in the background of my photo and, holding down the left mouse button, I drag the selection to a black area in the background and release the mouse button. Instead of turning the selected area black it just makes the area slightly darker than it was originally. I just don’t understand why I can’t use the patch tool and any help would be appreciated.
The Patch tool attempts to match the edges and may color the entire patch if it's relatively small.
Maybe you should to try to use the Clone Tool instead. Or just Copy / Paste. You can even drag a copy - just select source pixels, choose the Move Tool, hold down the Alt key, and drag a copy to the place you want to cover.