Increase Mesh

[trainor48]

I am new to the Make Human community, I typically scan my friends, clean them up in Meshmixer and Blender, then Print them in Resin for Model Trains and Military Models. I am trying to make a figure of a friend that has passed. I can create that with reasonable similarity, but the head (which I only care about) looks like a low poly model. I want to increase the mesh for finer resolution and bender sculpting. The head will go on other bodies and get printed. Am I missing something or setting or configuration?

Thank you.