Visual Studio 2013 Preview IDE helps us to view the code definition with in the same code window without navigating to other files. This feature is known as “Peek Definition”. “Peek Definition” improves the overall developer productivity and getting things in a smart manner. The fundamental of this features is very similar to how the traditional "Go To Definition” works. The only difference you will find is, it will display the code in the same window as an extended editor.
Click on “Peek Definition” form the context menu or use shortcut key “Alt+F12” to leverage this features .
Fig: select “Peek Definition” from context menu to see the members definitions of “Student” class.
This will open a small extended windows with the definition of the selected members as shown in the following.
Fig: Definition of “Student” class showing in peek definition window.
Similarly you can use the “peek definition” option from the previously open window itself.
Fig: Peek Definition for “Address”.
Fig: Navigation with in Peek Code Window.
You can also you the “promote the document” ( Which was introduced with VS 2011 Dev. Preview) feature to promote any open peek code windows to a main window.
Fig: Promote ‘Code peek window’ as main window