Path: Logistic General- Material Master- Basic Setting- Material Types- Define Attributes of Material Types.
2. To maintain the attributes for each Material Type please select the Material Type by choosing the box located left side of respective Material Type. Choose Details. The attributes of Standard Material Types can be used as it is. To define a new material type, it is advised to copy from any existing Material Type. And choosing Quantity/value updating in Dialog Structure.
Path: Logistics - General - Material Master - Settings for Key Fields -Define Material Groups
hope so this will solve your problem.
Thanks & regards