GGU-3D-TRANSIENT: Fixed BC menu
- GGU-3D-TRANSIENT: General notes on "fixed" boundary conditions
- GGU-3D-TRANSIENT: "Preferences" menu item
- GGU-3D-TRANSIENT: "Point potentials" menu item
- GGU-3D-TRANSIENT: "(Potentials) In section" menu item
- GGU-3D-TRANSIENT: "(Potentials) Linear" menu item
- GGU-3D-TRANSIENT: "Point sources" menu item
- GGU-3D-TRANSIENT: "Linear sources" menu item
- GGU-3D-TRANSIENT: "Diffuse sources" menu item
, multiple selections available,