Up to Release 3.0, the screen layout can only be predefined per document.
As of Release 4.0, the options for defining the screen layout have been extended as follows:
This means that the field control varies depending on the function being performed by the user, the document (requisition, purchase order etc.), the document type, and the release indicator.
For more on the user-specific definition of the screen layout with parameter "TCV", please also refer to the Release Info New user parameters.
Please refer to the IMG documentation
Define screen layout