Working Plane

To create a Working Plane in the Main Menu select New Entity - > Basic - > Working Plane

There are some algorithms to set the Working Plane and the Camera Position.

Firstly, you can select a Plane, a Planar Face or a Local Coordinate System to be your Working Plane

Arguments: Name + 1 selection (face or planar face),

Secondly, you can define a Working Plane by two Vectors

Arguments: Name +  2 vectors,

Finally, you can select one of three basic projections of XYZ coordinate system to be your Working Plane