I don't think you will get the shape you want vertically.
Thats the point, a year ago I was able to modify it in the vertical plane as I described above but now I can not and have to resort to doing an "L" shaped CW in Plan and then rotating it in Elevation.
Previously I drew a straight curtain wall in Plan then in a Section window added a new node to the reference line of the CW and then I adjusted the top node of the CW to the new horizontal position (well technically it forms a slope of 3 degrees to shed rainwater)
AC versions 3.41 to 25 (UKI Full 5005). Using AC25 5005 UKI FULL Mac OSX 10.15.7 (19G2021) Mac Pro-2013 32gbRam AMD FirePro D500 3072 MB graphics