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Symbols are taken from the currently selected character set and are sized,
slanted and rotated in the same way as characters.
S c
SP pe}lnumber [;]
This command selects the printer’s logical pen for subsequent plotting.
This command must be set in order to output.
Pen Ois white; it is used when no drawing is required or to draw white lines
on a black fill, with transparency off.
Pen 1 is black; values greater than I are treated as 1.
S v c
SV hpe [,optl [,opt2]]
This command selectsthetypeofscreenin.g(area fill) tobeappliedto vectors
(lines. hatching patterns (fill types 3 and 4), arcs, circles, and edges of
polygons, rectangles, and wedges). This command does not affect solid fill
types, labels, stroked characters, or edges of characters.
There are three types of screen fill: shaded fill, user-defined raster fill, and
predefine cross-hatch patterns.
The meanings of and relation between parameters are as given in the
following table:
Type Meaning
o no screening
I shaded
~
user defined raster
(see RF)
21 predefine
opt 1
opt2
ignored
ignored
shading percentage,
ignored
between O(white) and
100 (black)
index; the pen for the
O:black pen,
black pixels is selected 1;current pen
as follows
fill type ignored
. Without parameters, this command turns off screening.
Ifoprl and/oropt2ismissing,thepreviousandappropriatedefault valuesare
used.
117