The style you show is not possible - multiple ID's on one line.
ArchiCAD can group multiple items if every field scheduled exactly matches. So, you could omit the ID field and display a Quantity field to get a count showing 2 of the first window and 1 of the second. But, the fact that the first two windows have different ID's forces them into separate lines if the ID field is scheduled.
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB