Dear Xiong,
Sorry, Could you please repeat the first two questions?, I don’t think I understand what you mean.
3. Using the USERDUMP card it will call the default MGDRAW and after the simulation you will get an output file (*dump) that you can plot in the Geometry Viewer in the same way as you did for USRBIN. I leave here the input with that:
Test.inp (3.8 KB)
Cheers,
André