Select faces of .stl

Hi I need to edit a .stl file, and need to select some faces to extrude them out a bit more. I try ctrl-shift, but this works horrible, Is there an easy way to edit an stl file. ?


I found it out, need to explode the object first.

You can also use ExtractMeshFaces to extract a few individual mesh faces from a mesh without exploding it. If it’s a heavy mesh, exploding it may cause memory issues…