by Julieanne Kost
After adding a layer mask to hide portions of a layer, it can sometimes be difficult to determine if there are any small bits of the layer that have been accidently left behind. In this case, it might be helpful to temporarily add a layer effect such as a bright red stroke ( Layer > Layer Style > Stroke and click the color swatch to choose a vibrant color) . The stroke will now appear around any small areas of the mask that you may need to clean up. When finished, simply remove the layer effect by dragging the “fx” icon on the Layers panel to the Trash icon).