Recognize the common modifier keys
Keyboard shortcuts work with modifier keys, which are those keys that don't do anything by themselves. For instance, the Shift key doesn't do anything when you press it down by itself, but it changes the behavior of other keys.
Each key has a symbol by which it is known. These are the key symbols you will see in menus and charts:
Shift | 
Escape (esc) |
Command | PageUp or Page Down |
| Option | Delete |
| Control | Arrow keys |
| Return ... |
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