fully defined sketch

Draw a circle in the top plane and extrude a cylinder. Create a sketch on the front plane and view normal to the sketch plane. Use the "use" tool to create a silhouette edge on the side of the cylinder. The sketch is not fully defined. In the sketch diagnostics tools, the endpoints of the silhouette edge are considered…

I don’t know if I’m doing something wrong or if I’m just not understanding, but I’m trying to make a body tube for a model rocket and I’ve been stuck trying to do a simple circular pattern around the Z‑axis of my body tube (a cylinder). I’m new to Onshape, but I have experience with other CAD software, and for some reason…

What am I missing here to fully define this sketch? This often happens to me when working with the arc tools.

Reference document: Octagonal pedestal - multipart https://cad.onshape.com/documents/28044d76fae64781bc7c9c46/w/f0b392a79f784531824bf25d/e/f31eb6eef1ea46ceb4d1ee03 Part Studio: Parts Rev 2 Sketch 1 I've created an octagon shape with two lines using offset. To this point, the sketch is fully defined. I added a box at the 9…

So, let's say you've got a complex .dwg that you just want to import because you're too lazy to simplify it... in Inventor you'd just autoconstrain the whole shebang and you're off to the fully-defined races... and can delete constraints as you need later on. Anything like that in Onshape, and if not, might it conceivably…