The "Alt" key The "Backspace" key The "Command" key The "Control" key The "Delete" key The down arrow The "End" key The "Enter" or "Return" key The "Escape" key The "Home" key The "Insert" key The left arrow The "Meta" key The "Option" key The page down key The page up key The right arrow The "Shift" key The spacebar The "Tab" key The up arrow Indicates a non-standard function key Indicates a non-standard function key A (single) mouse click. A double mouse click. A mouse or key press. Sequential clicks or presses. Simultaneous clicks or presses. Indicates a non-standard action Indicates a non-standard action