Brother HL 5370DW - Manual (Page 165)

Appendix
155
A
Box drawing
0
ESC i ... E (or e)
‘E’ or ‘e’ is a terminator.
Line block drawing
0
ESC i ... V (or v)
‘V’ or ‘v’ is a terminator.
Expanded character data start
0
n = ‘l’ or ‘L’
Data that follows ‘l’ or ‘L’ is read as expanded character data (or labeling data). Expanded character data must
end with the ‘ \ ’ code (5CH), which also ends this command.