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<!Converted with LaTeX2HTML 95 (Thu Jan 19 1995) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
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<TITLE> Object groups</TITLE>
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<H2><A NAME=SECTION00026000000000000000> Object groups</A></H2>
<P>
Drawing objects can be aggregated to groups of objects. Groups can be
aggregated with other groups or drawing objects to higher level
groups. Groups can be ungrouped later. Grouping information persists
even if the grouping mode is inactive.
<P>
If the grouping mode is inactive then objects can be selected, deleted
or modified without beeing influenced by the group structure.
<P>
If the grouping mode is active then the selection of objects is
influenced by the group structure in the following way:
<UL><LI> If according to the context only the selection of a single
  object is reasonable, then the object you clicked on is selected,
  e.g. you select a line to draw a parallel line.
<LI> If you click on an object e, then all objects are selected which
  belong to the same groups as e (highest level group and all
  subgroups). If e is not in a group, then e is selected.
<LI> If you define a selection rectangle, then all objects are
  selected which are not part of a group, but are within the
  rectangle, and all objects of those groups where all objects of the
  highest level group are within the selection rectangle.
</UL><BR> <HR>
<P><ADDRESS>
<I>Hans-J. Siegert <BR>
Sat Jul  5 19:31:53 MEST 1997</I>
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