How to hide Blue line covering views in xib/Storyboard in Xcode

I am using xcode 7.2, in xib when i insert any view, label,txtField etc., all are showing this covering blue line. now it is very hard to insert/manage new view or anything in xib due to this line. Does anybody know how to hide these?

Solution

Same thing happened to me. In Xcode: Editor > canvas > show bounds rectangles. This option show/hide the blue lines.

If you found this one not work first time, try twice toggling the show bounds rectangles option. Some time this is not work in first time.