Yeah, there are only Zoom Out/In buttons. Maybe there’s better open-source tool for that, I stick to this one, but I don’t need it that often.
Yes - Learning Edition, but of course it has some limitations and can’t be used for commercial stuff. Excel should suffice though.
In PrePoMax, you can request it as history output this way:
Me too, it’s a must in my tutorials. But I switched to Calcpad some time ago.
For solids, hexahedral meshes are pretty much always desired, but they are mostly applicable to very basic shapes created by extrusion, revolution or sweep (or offset from shell quad mesh). Plus for subvolumes having 5 or 6 faces with 3 or 4 edges each. So only really simple models and ones that you can split or simplify into such shapes. Here are the main rules of hex meshing in PrePoMax: Summary of Gmsh hex meshing rules