QMS SmartWriter 80+ User Manual page 326

Examples:
<ESC>A<EM> Set line spacing to 25n2"
<ESC>A<VT>
Set line spacing to Iln2"
I
<ESC>21 START TEXT LINE SPACING
Begins line spacing at the value set by <ESC>A If no
<ESC>A sequence has been entered, line spacing will be
6 LPI (lines per inch).
F-20
Proprinter Emulation Mode