Set/Delete Auxiliary Geometry
Sketch > Tools > Set/Delete auxiliary geometry 
Use this function to define sketch elements as auxiliary geometries. These auxiliary geometries will be ignored when parts are created from sketches, e.g. extruded parts, revolved parts, plates from sketches, beams from sketches etc. Instead, you can use them as construction aids, e.g. for the assigning of HCM constraints, as rotation or mirroring axes etc.
To define an auxiliary geometry, call the Set/Delete auxiliary geometry function and identify the corresponding elements of the sketch. These elements are highlighted as red, dashed lines (see image below).
To reconvert elements of auxiliary geometries into "real" sketch elements, call the Set/Delete auxiliary geometry again and identify the elements of the auxiliary geometry. The representation of the elements will be changed immediately
Revolved part created from a sketch. The auxiliary geometry was used as rotation axis.
Please note:
- Auxiliary geometries contained in the sketch will be considered for the generation of sectional and detail views. This means that edges marked as auxiliary geometries will have no influence on the geometric representation of the sketch.
- Auxiliary geometries will be considered for the calculation of HCM models.
