Enhanced scrollbars, to help developers be more productive, were incorporated into Visual Studio 2013.
Scrollbars can viewed in ‘map mode’.
In map mode, the traditional scroll bar is replaced by a visualization of the code in-place in the scroll position.
The visualization displays annotations, small color markers within the scrollbar showing areas of interest within your code, such as the current caret position, code changed since last save, the position of errors or warnings or the position of breakpoints within code.
The scroll bar can be viewed in a preview mode that turns the scrollbar into a shrunk down visualization of your code in-place in the scroll window. As you scroll the visualization synchronize with your code so you can more quickly find what you are looking for.