When I saw a Sublime Text 2 with their features at first time – I loved that. One of my favorite feature is a minimap. It is a simple but very powerful idea to replace scrollbar with minimized code map. Using this feature very easy navigate directly to where you want.
I wanna this feature for Visual Studio for sure. Fortunately, it is already there. It is a part of the Productivity Power Tools.
First of all we need to setup Productivity Power Tool using Visual Studio Extension Manager.
We need to enable this feature, because it is disabled by default. Open Tool -> Options -> Productivity Power Tools, enable Enhanced Scroll Bar and restart your Visual Studio.
Choose ‘Full map mode‘ in the Productivity Power Tools->Enchanced Scroll Bar section.
You should see minimaps in your Visual Studio now. Enjoy it!!!
Sergey Tihon's Blog 
thnx you. I was looking for something like this long time.
Take a look at this tool, its based on minimaps: http://www.codeminimaps.com
Any idea how to do this in vs2015?
I can’t seem to find the Productivity Power Tools->Enchanced Scroll Bar section
RockMargin2015 seems to work well enough as a code minimap, and is also available in the vs extensions browser.
You can also right click on scroll bar in VS and than choose last option “Scroll bar option…”. Under Behavior section select “Use map mode for vertical scroll bar”.