insert -> tables - > separate materials
select "with return" if you want it in scale mode, or "only parts" if you only care about the parts, or "only first level" if you only want the first level.
to export it: Right-click on the created table -> save by name.
Bye.
per assembled You mean together, in a .sldasm file?
first of all obviously you have to create it/inserirla with the command Tables > separate materials, and this is done directly "to video" by viewing in real time (I do not understand your problem. . ).
What version do you have of swx? from 2009 it is possible to insert the distinction also in the 3d axieme, first only in the tables.
then you can hide it by right in the tree and choosing it hide tables.
Yes, you can export to excel, always right clik save by name (Nothing strange seems to me).
but on the online guide is all explained. .