About the Workspace Window
Use the workspace window to perform your core development tasks.
The workspace window is your primary interface for creating and managing the workspace and working on the projects and files represented in it. It is designed to be flexible and configurable, adapting to the needs of the task at hand and allowing you to configure it to fit your work style.
The figure shows a common configuration of the workspace window, with its six main components.
The toolbar includes workspace-level tools for managing and running schemes, viewing the progress of executing tasks, and configuring your work environment.
The tab bar is optional if there is only one tab open; choose View > Show Tab Bar to show it. Tabs can be reordered, closed individually, or dragged out of the bar to create a new window.
The main content area, below the toolbar, always includes the editor area. When you open a file in your workspace, its contents appear in the editor area. Xcode opens the appropriate editor or application for the file, if it has one; if not, it displays the file using the Quick Look facility of OS X.
The content area can also include three optional areas:
Navigator area: Provides tools for viewing and maneuvering through various facets of your projects.
Debug area: Provides controls for program execution and debugging, and displays panes for variable, register, and status information.
Utility area: Provides Quick Help, file and data inspectors, and pre-tested resources such as code snippets and media objects.