About Creating a Flat Surface
When you create a flat surface using Restyle:
The point that you select is the origin of the flat surface.
Restyle orients the flat surface with respect to the reference direction. The orientation of the surface can be changed by modifying the angular dimensions.
You can select datum planes, axes, edges, and facet faces as direction references for creating the flat surface.
You can specify any two direction angular dimensions. Restyle calculates the third dimension using these two dimensions.