Brother  HL-4140CN, Technical Reference Manual

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RAM Random Access Memory. The printer's memory in which fonts and macros can be
stored and where pages that are to be printed are composed.
Raster graphics A method of representing a graphic image as a series of zeroes and ones that
correspond to white and black dots respectively.
Relative plotting A method of plotting in the HP-GL and HP-GL/2 graphics language where
coordinates are specified relative to the point at which the last graphics command
terminated.
Reset
When you reset the printer you restore a base set of conditions. A reset can either
be performed using the control panel or by sending the printer a reset command.
There are two types of reset, the normal reset and factory reset. A normal reset
simply restores the current emulation mode with the most recent control panel
settings -- it does not change the emulation mode itself. A factory reset makes
LaserJet mode the current emulation mode and restores the factory default
environment.
Resident font See internal font.
ROM Read Only Memory. Part of the printer's memory that contains the software
controlling the printer and the printer internal fonts. The ROM cannot be altered
unless the type of ROM fitted to the printer is Flash ROM, in which case it can be
written to electronically via the parallel port of the printer .
Row A horizontal sub-division of the page whose height is equal to the VMI (vertical
motion index). The print position moves down the page a distance equal to the row
height when a line feed is performed.
Sans serif A kind of typeface normally used for headlines. Sans serif typefaces do not have
little hooks (serifs) on the individual characters. This helps Sans serif headline text
stand out more prominently.
Scalable fonts A font for which you can specify the character size. The printer will automatically
scale the characters to the size you require.
Scaling In HP-GL or HP-GL/2 mode you can use the SC command to scale graphic
images. The three types of scaling are known as anisotropic, isotropic and point
factor scaling.
Scaling points Two imaginary points called P1 and P2 that define a rectangular area relative to the
picture frame. You can use the HP-GL or HP-GL/2 SC and IP or IR commands to
transform and scale images by changing the relationship between the two scaling
points.
Scalable typeface A typeface for which you can choose a point size (height) in order to obtain a
particular font for printing. For example, you might select the Utah typeface and
then select 14 pt. as the height. The printer has many resident typefaces. You can
also buy scalable typeface cartridge and disks.
Secondary font In LaserJet mode the printer maintains two current font settings. The secondary
font is the second of these.
Serif A kind of typeface normally used for body text. Serif typefaces have little hooks
(serifs) on the individual characters that makes text more readable.