super quick tip: sample on a new layerMay 4, 2007
If you have an image that you want to fix up (taking out white spots, removing objects, etc.), you’ll use the sample tool (in photoshop of course). The shortcut is ‘S’.
Instead of sampling on the same layer as the image (as most people do), create a new layer and use it there instead. This way you can preserve the image and have more control over the sampling. Make sure that you have the “sample all layers” option selected, this allows you to use the pixels from the image in the layer below (thus preserving the original!).