Netgen Surface Refinement

Dear Netgen team,

I’m trying to remesh a surface mesh based on an STL file. I can get everything up and running and was able to create a surface mesh. My question is: I can mark one of the generated surface with the mouse and it highlights it in red (see screenshot). Is it possible to define a new mesh size on all those surface triangles and refine there? Can this be also done for the volume mesh? from 2020-01-30 10-08-11.png