Oki Microline ML380 Handbook page 139

Standard sheet.
The standard paper size is 8.5" by 11". Most printer defaults (margins, page length, top of form) are set for this
standard.
Subscripts.
Characters, generally of a smaller size, printed below the normal character line and used for chemical formulae,
fractions, and other related functions.
Superscripts.
Characters, often of a smaller size, printed above the normal character set and generally used in footnote notation.
Top of form.
Your printer permits you to specify how far down the page printing will begin. This location, called the top of
form position, is generally retained in memory so that, once set, all printing will start at the same place on each
page.
Tractor feed.
A device for moving continuous-form paper around the platen. It employs two sets of pins on motor-driven belts
with spring-loaded covers. The spocket holes in the continuous-form paper fit over the pins; the tractor covers
hold the paper in place on the pins.
There are two types of tractor: push and pull. Push tractors are generally built into the printer and are driven by
the printer motor. They are positioned before the platen in the drive path and push the paper around the platen.
They can only be used for feeding in paper from the rear. Pull tractors are optional accessories which mount on
top of the printer and are driven by the printers gears. They are positioned after the platen in the drive path and
pull the paper around the platen. They can be used for feeding paper in from the bottom as well as the rear. Using
both tractors for rear-feed, continuous-form paper provides precise control of paper movement.
Typeface.
A set of characters designed to have the same basic contours and form. Within a typeface, there can be many
fonts, whose characters have the same basic form, but differ in thickness, angle, size and/or
style. For example, many typefaces come in a choice of regular, italics, bold, and bold italics fonts.
Unidirectional printing.
Printing in one direction only (the left-right stroke). This is generally only used when printing very high
resolution graphics which might be affected by irregularities in bidirectional feed. It is much slower than
bidirectional printing.
Utility printing.
A print quality used for drafts and memos. It is faster and of lower resolution than LQ printing.
Vertical Tabs.
Vertical tabs operate much like standard horizontal tabs, but in the vertical direction. When vertical tabs are set,
the paper will roll up to the next vertical tab position when the vertical tab (ASCII character 11, decimal)
command is given.
White space.
The blank, unprinted areas surrounding printed text and illustrations.
ML 380 ( 96-02-03 )