This could be a version 21, 22 thing or it could be the old USA, AUS, INT library differences.
I just looked in version 22 AUS library.
We do not have the triple transom window that you show, but we do have the option to change the sash opening type for each sash.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10