Rotate a grid plane - Intergraph Smart 3D - Help - Hexagon

Choose Select on the vertical toolbar.

Select Grid Plane in the Locate Filter box.

Select the grid plane to rotate.

Select Edit > Properties.

Select the General Tab.

Select the Axis of Rotation to use.

Select the Rotation Offset Type you want to use. See General tab (Grid Plane Properties dialog) for information about the available types.

Optionally, define an offset distance.

Define the angle of rotation using either the Angle of Rotation box or the Slope (1/X) box.

Select Apply.