The keys that change what another keypress produces rather than producing anything themselves. Three different kinds of authority sit in this group and the records keep them apart: some are encoded characters with Unicode code points, some are vendor marks defined by Apple or Microsoft for their own platforms, and the rest are conventions nobody defines. The set is also where the catalogue's clearest near-identical pairs live — shift against caps lock differ by one bar beneath an arrow, and that bar is the whole difference between a modifier that applies while held and one that latches.
A hollow upward arrow, marking the shift key.
An upward chevron marking the control modifier on a keyboard.
A horizontal bar over two angled tails, marking the option modifier.
A looped square with four outward corners, marking the Mac command key.
An upward arrow above a horizontal bar, marking a latching shift.
A four-pane window mark identifying the Windows modifier key.
The letter F with a numeral, marking a programmable key.
An arrow leaving a circle, marking the escape key.