APPX System Control is a starting point for users and a general reference repository for designers. Most APPX customers use a "Main Menu", created in System Control, as the initial screen presented to users when they log in. From here, users can select the specific application or process they require, from on-screen choices, pull-down menus, etc.
Designers often create domain definitions in System Control, for fields that are referenced throughout their multi-application systems. APPX domains help keep related fields consistent, and provide one central location where they can be maintained, modified, and documented.