To edit a placed Curtain Wall graphically, select it in Section or the 3D window, and use the pet palette commands. These are analogous to the commands used to graphically edit walls. (Some commands might not be available in every window type.)
As you change the Curtain Wall height, its thickness remains the same but its slant angle is adjusted accordingly. The Curtain Wall’s Reference Line stays in place.
The Tracker fields reflect the new slant angle as well as the horizontal distance that the selected Curtain Wall edge is moved. The Curtain Wall is slanted, pivoting around its Reference Line.
Another graphical option is to free-rotate the Curtain Wall, available in the 3D and in Section/Elevation-type windows.