Look at the 'Construction Method' buttons in the shell settings.
You can create a 'Simple' rotated shell (semi-circular dome) and then adjust the profile shape afterwards or you can create a 'Detailed" rotated shell where you can specify the profile shape that you want to rotate.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11