The idea is to integrate sketchbook drawing in F360 with two modes, "3D Canvas" and "Blueprint Box".
3D Canvas:
Create the raw form of your design then convert the solid/surfaces in a 3D canvas to draw details and variants quickly on the surface or project lines on it:
The raw form:
The 3D Canvas with some sketch lines:
Blueprint Box:
Create a box with editable dimensions, then choose a face and sketch the monge projection. Do the same with the other faces.
Back in model mode, each face should appear in the corresponding orthogonal view with its opacity control.
Editing a face (The other faces for reference):
The box preview with the sketches: