Menus or buttons more generally actions in the GUIs are typeset like this: Menu . Code_Aster reserved words, operators, function names, key- words, concepts are typeset like this: MECA_STATIQUE. File, or exten- sion, names are typeset like this: .comm. And windows, or dialog boxes, titles as they appear on the screen are typeset like this: Gmsh. “X” or “YOZ”, in uppercase refer to a global direction or plane, while “x”, in lower case, refers to a local direction i.e. in the local element coordinate system