This paper describes Word Manager, a system which is currently the object of a research project at the University of Zürich Computer Science Department. Word Manager supports the definition, access and maintenance of lexical databases. It comprises a formal language for the implemenation of morphological knowledge. This formal language is integrated in a graphics-oriented, high-level user interface and is language independent. The project is now in the prototyping phase where parts of the software are pretty far advanced (the user interface) and others are still rudimentary (the rule compiler/runtime system). The design of the system was strongly influenced by Koskenniemi's two-level model /Koskenniemi 1983/, its successors /Bear 1986/, /Black 1986/, /Borin 1986/, /Darymple 1987/, the ANSI-SPARC 3-Schema Concept /ANSI-X3-SPARC 1975/ and visual programming techniques /Bocker 1986/, /Myers 1986/; We will focus the discussion on one aspect: the user interfacing for the construction of the lexical data base.