The Problem
It's often the case that you need to design a solution for something, but you don't want to mess with the model until it's complete.
Most likely, the best solution is to sketch with annotation lines.
The Solution
Why not make it possible to make any view an underlay in a drafting view? That would be amazing. Multiple underlays would be even better.
ArchiCAD has had this functionality for a long time, and it's awesome. It's called Trace Reference. Since Revit already offers the option in plans, why not make it an option in Drafting Views (or better yet, all views) also?
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