[Koha] Question about changing the material type in a Koha record

I haven't been cataloging very long, and so I am still learning. Can someone please tell me how to change the material type in a Koha record? In our basic records, I cannot access the 336, 337 and 338 tags. Can you still change the material type without those tags ? *Ramona Ratliff * Information Specialist *York University* Office: (402) 363-5708 | rjratliff@york.edu <email@york.edu> | *york.edu <http://www.york.edu/>*