Brother SX-4000 - Manual (Page 6)

KEYBOARD
(*) Hold down [CODE] and press the key to activate these functions.
(**) Hold down [ALT] and press the key to activate these functions.
“[ALT] + appropriate key" or “[CODE]+appropriate key" will be used
in this manual when the [ALT] or [CODE] must be held down while the
appropriate key is pressed.
The following functions and characters can be repeated by holding
down the corresponding keys:
NORMAL CHARACTERS
HYPHEN
SPACE BAR
BACKSPACE
RETURN
TAB (carrier moves from one tab to the next)
CORRECTION
INDEX/REVERSE INDEX