Interactive tools for developing human-computer interfaces are complex software systems, often in relation to their functionality. Such tools (UIMS) for developing human-computer interfaces have complicated human-computer interfaces themselves [ACM]. This chapter discusses human-computer interface design of HCI Studio User Interface Management System (UIMS). Human-Computer Interface design, like any other aspect system design, should be carried out in top-down fashion. It’s design process passes through the following sequence:
1. Choosing the interface style.
2. Determining the user model.
3. Designing the interface formats.
4. Designing error handling.
5. Designing data structure.

• 3.1 Choosing the Interface Style
• 3.1.1 Elements of the WIMP Interface Style
• 3.1.2 Object and Action
• 3.2 Determining the User's Model
• 3.2.1 The Application objects
• 3.2.2 The Control Tools
• 3.3 Designing the Interface Format
• 3.3.1 Constructing an HCI Project
• 3.3.2 Navigation among HCI Pages
• 3.4 Designing Error Handling
• 3.5 Designing the Help System
• 3.5.1 Requirement of help system
• 3.5.2 Approaches to provide help