A method and apparatus for associating selected circuit instances, and for allowing
a later group manipulation thereof. Prior to entering a database editor tool, selected
instances may be associated with one another, and the association may be recorded
in the circuit design database. The database editor tool may then read the circuit
design database and identify the selected instances and the association therebetween.
The associated instances may be called a group, or preferably a stack. The database
editor tool may then perform a group operation on the instances associated with
the stack.
