The integrated development environment (IDE) provides various tools and options to help you position and move among document and tool windows. Once you have a window layout that you like, the IDE remembers this layout between sessions so you do not have to reposition windows each time. For example, if you change the docking location of Solution Explorer and then close the application, the next time your start Visual Studio, Solution Explorer will be docked in its new location.
Two different interface modes are provided for working with document windows: Multiple documents mode and Tabbed documents mode.
The IDE provides a parent frame that serves as a visual and logical container for all document windows.
Document windows are placed side-by-side on tabbed panes. The IDE uses this mode by default.
You can change IDE interface modes using the General, Environment, Options Dialog Box.