In Aggregate Editor, when adding data sources, there should be options or modes on how Columns are added (or not added) to the header row.
- Add All Columns
- Add No Columns
- Add Identity Columns only
- Add Primary Identity Columns only.
- Add Non Identity Columns only
- Add Static Label only.
Thinking that some type shortcut similar to mouse onDragRelease with Keypress(alt,crtl,shift) event for windows File Drag&Drop move/copy/or popup menu operations.