Changes and Saving "Old" Plans

1. Select all the structure that will be deleted or changed.
2. Create a new group with that selection set.
3. Select that group, select "Link" from the group menu.
4. A new rvt file is created, linked into the current project.
5. If you want to delete the linked structure, use "manage links" to unload it.
6. If you want to modify the linked structure, use "Bind" to copy the linked file into the project, a copy rvt should be saved separately??? (verify this)