Productivity power tools 2013 remove vertical indent lines

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?

Solution 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:

Solution 2:

VS 2013, I have to include this step:

Tools --> Options --> Productivity Power Tools --> Other Extension --> Turn off "Show code structure in Editor"

Solution 3:

For VS2017 go to Tools->Options->Text Editor->General - uncheck Show Structure Guidelines.