While I am at it, I don't see this question addressed.  I use the cable tool, copy the cable line add some width to it, change it to yellow and send it to the back to highlight new work, or upgrades.  This way the line already perfectly lines up with the line I am highlighting.  The problem comes when I need to change its path.  I can't seem to quickly grab the thick yellow line.... eventually I can, but it doesn't make sense and isn't easily repeatable.  This is just an efficiency question.  What is the trick?