Rotation of a model

I created a 3D model in Ansys, and when I wanted to mesh, I realised that the model was created in the wrong plane:  the area I wanted to mesh was in the x-z plane, while the plane82 element I needed to use needs to be in the x-y plane.

 Is there a way I can rotate my entire model instead of starting from the beginning?

In addition, how can I create a cylinder with the circle in the x-z plane and its depth in the y direction.  Creating circles and cylinder only gives the option to create the circle in the x-y plane.

Thanks