GenVoca is a domain-independent model of hierarchical software system design and construction that is based on large-scale reuse. This model is a blueprint for implementing software component technologies in many domains. In this paper, the authors discuss the main features of GenVoca model and present a reusable graphical editor (GE) software architecture based on this model. They explain the realms and their components of the architecture, examine the relations between these components, and show how combining these components into some graphical editors is achieved.