The layout of MMBE can be managed via transaction OMBG. Here a new "display version" with its own layout can be created. The display version can be chosen by entering its number on the entry screen of MMBE. Proceed like the following:
1. enter transaction OMBG
2. click "display version"
3. new entry, give it a number and a description
5. go back and click "Rules for display and stock balances"
6. set up how you want you fields to be displayed for your new screen version
Alternatively it is possible to use transaction MB5B to display the current stock. The layout management is more flexible in MB5B, it can be accessed directly from the transaction itself (Button "Current Display Variant").