Hello everyone, 

I built a mixture containing 12 types of molecules with different molecule numbers in Amorphous Cell module. But some types of molecules belong to the same category. Now I want to define a set for all molecules in the same category, how can I achieve this?

"Edit set" tool can be used to define a set for one type of molecule, but I don't know whether this can be also applied to define a set for several types of molecules. If yes, how? Can anyone give me some advice?

Thank you for your attention.