Chapter 3 Specifying Master Units and Minidriver Data

Most printers support commands with a variety of resolutions. For example,
the Immediate Line Feed command on the Kodak Diconix printer operates with
a vertical resolution of 1/288th of an inch while the same printer operates
with a vertical-graphics resolutions of 1/96th of an inch. To simplify the
problem of handling various resolutions, the Microsoft Windows Universal
Printer Driver uses a single, common coordinate system. The units in this
coordinate system are called master units. Master units are the
least-common multiple of the various horizontal and vertical resolutions
supported by the printer. The MiniDriver Data dialog box contains controls
that you use to specify the vertical and horizontal master units for a
printer. From the Printer Data menu, choose the MiniDriverData command. The
following illustration shows the MiniDriver Data dialog box:

bitmap:  mstunits

In addition to specifying master units, this dialog box contains controls
to specify a Generic Printer Characterization (GPC) Specification version
number, a minidriver version number, the printer's technology, and the
absence or presence of a private help file. The GPC Specification refers to
the format of data resources contained in the minidriver.