the EiffelStudio,

the integrated development environment for Eiffel, the language

    This is how the Integrated Development Environment of Eiffel, the EiffelStudio, looks like. It has four panes, marked on the figure: Features, Class, Clusters, Context.

    There will be others, such as Search, and you can remove any of them, except Class, at any time to make room for the others. What you see is one "Development Window", of which you can have as many as you wish. Some people prefer to use a single development tool, avoiding screen clutter; others don’t think twice about having lots of windows, taking the "desktop metaphor" to its full conclusion (some non-computer desktops are quite cluttered). There are many ways to start a new DevelopmentWindow; for example if you look at the entries in the File menu at the top left, New window, which would create a new Development Window. Whether you have one DevelopmentWindow or many, each may have as its target an element of the system: system, cluster, class (the most common case), feature, runtime object. This simply means that the tool displays information about that element.