Check the box shown in the attached to show identical entries as one row. The 'quantity' field will show the number of windows with the same specs.
Note! The 'identical' criterion is based ONLY on the scheduled fields - so the windows may in fact NOT be identical. For example, if all you scheduled was the window width, then every window that is 3' / 1m wide would be grouped together - even if their heights differed. Scheduling the height breaks them apart. Scheduling further (e.g., frame info) might break things apart even more...
Scheduling the library part (as you did) will group lib parts together. But, often your documents should not show an (ugly) GDL lib part name ... so then it is useful to use one of the user-defined fields to type in an architect/client/builder-friendly name for the window type ... and schedule that field in the printed schedule and not the lib part.
I always have at least two schedules - a 'working'/editing schedule that includes the lib part name and other fields for me to set up the various other fields and/or to edit the model/change lib parts... and the documentation version of the schedule that excludes those fields.
Cheers,
Karl
One of the forum moderators
AC 27 USA and earlier • macOS Ventura 13.6.9, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB