DEC Set Cursor Style—an escape sequence (\e[N q) that sets the cursor shape to block, underline, or bar, blinking or steady.

DECSCUSR was introduced in later DEC terminals and is now widely supported. N values: 0/1=blinking block, 2=steady block, 3=blinking underline, 4=steady underline, 5=blinking bar, 6=steady bar.