Hi all,

I am a CAD designer by trade. I'm pretty proficient at Creo/ProE that I use at work.
I have Fusion 360 on my personal computer and I'm pretty good at stumbling thru that too.

I can't find any way in either software to modify stl files.
I can open them - look at them - measure them, but I cannot select surfaces to build on or cut thru.
The software doesn't recognize them as a solid or even as surfaces or points to build on.

There has to be a way to do it or convert them to something that can be used, right?
What am I missing.

Thanks
Donna