(texdraw)Scaling

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5.2.1 Scaling
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The scaling commands provided in TeXdraw are designed to affect only the
coordinate values specified in commands.  For instance, changing the
'\setunitscale' value changes the interpretation of the coordinate in an
'\avec (X Y)' command, but does not change the line width or arrowhead
sizes in effect.  None of the TeXdraw scaling commands affect the size
of TeX text produced by, for instance, the '\htext' command.  Scale
changes will however affect the positioning of text for subsequent
commands.

   The line parameters are changed only if the corresponding commands to
change them are issued.  If the '\linewd' command is given, the current
coordinate scaling is used to determine the line width.  To achieve a
behaviour more like a global scaling, whenever the scale factor is
changed, the line parameters should be set again.