I wanted to reproduce the following sketch into a drawing to aid understanding - I was actually only interested in the construction geometry:
Unfortunately it seems that construction geometry isn't displayed and I only had the sketch of the Cam body which I didn't actually need. I had to create a new sketch, copy in the original one and turn construction lines into normal lines:
I suppose one advantage was I could delete the sketch elements I didn't want. I also don't know yet whether that has longer term implications on the component itself having this redundant (incompletely constrained) sketch.
It would be great if construction geometry was allowed in Drawings.
