Track Active Item

You can find that under Tools -> Options -> Projects and Solutions -> "Track Active Item in Solution Explorer".

Finally! Visual Studio natively supports jumping to the active document in the solution explorer with Visual Studio 2012. The command is called "Sync with Active Document" and can be accessed from the Solution Explorer toolbar.

SyncWithActiveDocument

The default shortcut is Ctrl+[, S and can be customised by modifying the SolutionExplorer.SyncWithActiveDocument command in keyboard options (Tools -> Customise -> Keyboard)

Active Document Sync

Active document sync is another new feature integrated in enhanced version of Solution Explorer. This navigates you to the active open document. Suppose, you have a open file in the editor window and now you want to go to the physical location of the file, you can just click the active sync button to easily navigate to that place.