| A | B |
|---|
| + shift | Add to a selection |
| + Alt or Option | Take away from a selection |
| + D | Deselect |
| + A | Select all |
| + click the layer | Selects all pixels on a layer |
| + shift + I | Select inverse |
| + J | Copies selected pixels to a new layer or copy active layer to a new layer |
| + C | Copy selected pixels |
| + V | Paste copied pixels from clipboard |
| + Z | Undo last action |
| Space Bar | to move a selection as you are making it |
| Shift | to constrain a selection to a square or circle |
| + delete | fills a layer or selection with your background color |
| + shift + N | Add new empty layer |
| D | resets default foreground and background colors to black and white |
| X | flips foreground and background colors |
| M | marquee (selection tool) Shift + M lets you access the other marquee tools |
| L | Lasso tool (selection tool) Shift + L lets you access the other lasso tools |
| W | Magic Wand |
| Q | edit in quick mask mode |
