Maybe I misunderstood your question. Are you referring to these lines?
If so, then they show up once shading with edges is enabled. Just shading, no edges, shows this:
I should add that each time you extrude a face it creates a new "cell" in the mesh. Is that what you were referring to by a mesh?
Thanks for the images. Still does not work on my system. But I tried it without loading my config files and now the lines show up. I will have to figure out if it's a config setting or a system color issue.
Yes, that's what I'm looking for.
tangent_edge_display = solid did the trick! Thanks! I had it set to "no".