As a rule, preset groups of units of measurement are enough for work with StoreHouse. But, if neeeded, new UOM groups can be created.
To create a new UOM group:

• Call the context menu in the left part of the Units of measurement window
• Select Create UOM group or use the Document > Create UOM group main menu item
  
  
• A window will open on the screen
  
• Enter the name of the new group in the Name line of the Group of measurement units window
• Use the Document > Save document main menu item or click the  button on the toolbar.