REFERENCE

If you require a plane to use for Features or Sketches that doesn't exist as a Default Workplane or a Face, you'll have to add a Reference Plane. Here's a few things to note on how to insert planes:

• Exactly between two faces (if you need to retroactively give yourself a "MidPlane")

• A series of planes that are spaced by your specified dimension

• An intersecting plane that goes out to a point that might otherwise not be sketchable

Cosmetic Threads are the least cumbersome method to add threads to a Cylindrical Feature to be added to a Mechanical Drawing (for use with Manufacturers)