Use the Rotation setting in the part properties to view and change the rotation of a part around its axis on the work planeplane that the user has chosen in a model and that is currently active for working on in a model view
Newly created, copied, or moved model objects comply with the work plane. For example, shifting the work plane to follow a sloped plane makes it easier to model sloped structures.
You can also define the angle of rotation. Tekla Structures measures positive values clockwise around the local x axis.