fix_modify_AtC add_species <TAG> <group|type> <ID> 
 fix_modify AtC add_species gold type 1  
  group GOLDGROUP type 1  
  fix_modify AtC add_species gold group GOLDGROUP  
Associates a tag with all atoms of a specified type or within a specified group. 
 
No defaults for this command.
 1.6.1
 1.6.1