Productivity power tools 2013 remove vertical indent lines

Question

I'm using "Visual Studio 2013 Ultimate" and "Productivity Power Tools 2013". There are these vertical indent lines and I don't know how to remove them.

I tried disabling "Column Guides", but it was not related to this.

Here is an image of what it looks like now:

Any ideas?

Answer 1

Found it. It is the "Structure Visualizer" option.
Go to "Tools->Options" and in dialog select "Productivity Power Tools".

It is an option close to the end of the list: