Mirror Coordinate Axis
When you set a local coordinate system in the model, you define a plane that will be the xy plane of the local coordinate system. The z axis of the coordinate system is the normal of the plane. The right hand rule determines the z axis direction. If necessary, you can mirror any axis of the coordinate system.
- Mirror X Axis
- Mirror Y Axis
- Mirror Z Axis
Note: When you use the function 
Set local coordinate system with three points, the direction of the local coordinate system is fully defined, so you cannot mirror the axes.
Set local coordinate system with three points, the direction of the local coordinate system is fully defined, so you cannot mirror the axes.