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The keys that move the insertion point or remove text, and the lock keys that latch a mode. Almost every one is drawn as an arrow whose meaning is carried by what stops it: an arrow arrested at a bar jumps to a boundary, an arrow with a bar above it moves by a whole screen, an arrow containing a cross erases. Reading the group as a system makes each individual mark predictable, which is not true of any of them read alone.
A left-pointing arrow marking the key that deletes backwards.
A right-pointing arrow marking the key that deletes ahead of the cursor.
A right-pointing arrow meeting a vertical bar, marking the tab key.
An arrow turning down then left, marking the enter or return key.
A leftward arrow meeting an upright bar, marking a jump to the start.
A rightward arrow meeting an upright bar, marking a jump to the end.
An upward arrow with a bar above it, marking movement by a whole screen.
A downward arrow with a bar below it, marking movement by a whole screen.
A shallow open-topped bracket standing for the space character.
A padlock enclosing a numeral, marking the numeric keypad latch.
A padlock beside a scrolling arrow, marking a rarely used latch.
A rectangle with corner marks, standing for capturing the display.
A small pointer beside a lined panel, opening a context menu.