Select control points of the open group that are inside a rectangle. The rectangle is
constructed by the end points of its diagonal. It is possible to filter
control points according to their semantics:
Type Vertex is accepted / not accepted
Type Segment is accepted / not accepted
Type Point is accepted / not accepted
As an option, a component filter can be defined. The filter must be
explicitly enabled. Currently, the filter can be configured to accept
visible and/or invisible components.
In incremental mode the identified components will be added to the select
set. In non-incremental mode the select set will be cleared before adding
the identified components to the select set. When issuing the command using a
mouse stroke, the shift key must be pressed to switch to incremental mode.