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The penmovement is performed by the procedures plotmove,
penup,pendown. Plotmove moves the pen to absolute point
x,y in the usercoordinatesystem if this point is inside
the subformat else plotmove moves to the borderpoint
which lies on the straight line between  the current
position and the point x,y. All procedures except plot-
clform and plotform uses plotmove for the penmovement.
plotmove does not change the pens vertical position.
This is done by the procedures penup and pendown which
lifts and lowers the pen respectively.
Characterplotting.
Drawing of text is performed through the standard zone
plotz. To this zone is connected the blockprocedure plot-
text which transforms the characters to penmovements.
The height and size of the characters are determined by
the variables plotheight and plotsize which gives the
size in cm. If the boolean plotspline is true the cha-
racters are splinefitted which means that the characters
will be very soft curves. For characters with a size less
than .4 cm the difference between the soft splinefitted
curves and the straightline approximated is nearly invisible.
The straight line characters are however much faster to
draw.
The zone plotz is in the userprogram handled either by
the procedure writeplot or the procedure write followed
by a call of setposition. A call of writeplot can be
thought of as a call of write folloved by a call of setpo-
sition. For further details see the description of the
blockprocedure plottext and the procedure writeplot.