Once you have your general selection it is now time to click on the Quick Mask toggle button. This will shade everything that is not selected a light pink. Your selection will retain its true color. Now, you can clearly see which parts you have selected and which parts are not. We can also add and subtract from our selection without affecting our picture in anyway.

In Quick Mask Mode you can use the Paintbrush Tool to add or subtract from your selection. To do this you must use the white or black colors. White will add to your selection while black will take from your selection. Using the Paintbrush Tool is exactly the same as using it outside of Quick Mask Mode except that it doesn’t paint on the actual picture. It will show up by either shading the area pink if you have the black color selected, or undoing the pink shading if it is set to the color white.