Star Micronics 8 Series Applications Manual page 111

For example,say you haveset the pagelengthto 84 lines (legalsize paper
at 6 lines per inch),with the top-of-page8 linesdown.You then send:
<ESC>N16
Thiswillgiveyou8linesoftopmargin(impliedbyyourtop-of-pagesetting)
and 8 linesof bottommargin.The printerknowsyou want84-16=68 lines
of text,so it printsthose,skips8 linesat the bottomof the first page,plus 8
more lines at the top of the nextpageto makeup the totalperforationskip
of 16 lines.
lop
o fpaw -8 Iirw
teal-68 lines
pefiofalion
If youchangelinespacingaftergivingthiscommand,youwon'taffectthese
marginsettings.However,if youchangepagelengthyouwillhaveto setthe
perforationskip again.
To set Skip-Over-Perforation to zero lines, send this command(the letter
after the <ESC>code is the capitalletter"o"):
<ESC>O
103