The Windows
The user interface of the program consists of one window, which is separated in different areas.
The biggest part (in the middle) of the screen is the Workspace. Drawings of the case and chains can be displayed and edited.
The Toolbar contains tools for case-management like loading, saving and printing.
At the top margin of the window there is the Menu, where you can find much more functionality than in the Toolbar.
The left margin of the window contains the Navigator (top) and the Inspector (bottom).
The right margin can display additionally information like a Hypertext-Region with a description of the current selected modelelement and its helptext, a panel containing tools for your preferred Operators and a panel for the settings of a step.

The regions at the left and right margin can vary in their size and complete deactivated. According to the situation there can appear more windows. This is explained in the subtopics.
Workspace
Navigator
Inspector
Hypertext-Region
OperatorTools
ConceptTools
StepSettings