I think there show be a grouping algorithm either under the Modify tab or a dropdown under the Window systems family tab that would give an option to group several windows into a mulled unit which would effect annotation tags and window schedules.
I think the benefit of being able to do this inside a project file allows for a greater number of mulled unit combinations rather than the current alternative which requires building a custom nested family.
Seems like it could be a simple feature that would greatly improve productivity.
- Jason C
