Xante ScreenWriter Colour ScreenWriter User Manual page 423

Volatile Parameters
Printer parameters which only last during the current power cycle of
the printer. For example, the PostScript parameter jobname specifies
the name of the current printing job being processed.
WPD File
Windows Printer Description file. A special file providing printer-
specific information needed by Windows applications so that the
applications work smoothly with a XANTÉ printer.
X-ACT (XANTÉ Accurate Calibration Technology)
XANTÉ's patented technology that allows you to calibrate printed
line lengths and correct inaccuracies in printing width, height, skew,
and angle. This is critical when printing color separations and other
jobs where pinpoint accuracy is essential for registration. See also
Registration.
X-HEIGHT
The height of a typeface's lower case letters without ascenders or
descenders.
XON/XOFF
A software-controlled protocol which controls the flow of data in
serial communication. See also DTR/DSR.
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