Mirror command can be found as following:
Menu,Insert,derived curve, mirror
Application:
creates mirror curves from curves across a mirror plane.
Use the Mirror Curve command to create Mirror Curve features across a datum plane or planar surface.
You can:
- Copy curves, edges, curve features or sketches.
- Create associative Mirror Curve features.
- Create non-associative curves and splines.
- Move non-associative curves across the plane without have to copy and paste them.
How mirror curve works in Siemens Nx?