Posted by R. van Twisk on Jan 10, 2021; 2:01pm
URL: https://forum.librecad.org/2d-drawing-from-an-stl-or-3d-object-tp5720035p5720038.html

Depending of your STL you could create a projection using OpenSCAD:

https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/3D_to_2D_Projection

This is often a technique (well not using OpenSCAD) in 3D packages to create 2D drawings,
you would still need to add your measurements yourself and it won't be parametric.