1.5 How can I see the Brillouin zone?

Use what='plot_bz'. See example12. With this option THERMO_PW does not call pw.x, it just produces a script for the asymptote code with the instructions to plot the Brillouin zone and the standard path (or the path that you have given in the THERMO_PW input). Starting from version 1.5.0 THERMO_PW produces also a script to plot the Brillouin zone using the freeCAD software (version 0.18). See more details in the user's guide.