Relative plotting - Page 11

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Proportional spacing

Fonts intended for high quality typographic output use a method of character 
spacing in which the space occupied by a single character on a line of text depends 
on the individual design of the character.  This is known as proportional spacing.  
Scalable fonts are almost invariably proportionally spaced. 

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.