I came across this command in my View-tab called Show Hidden Lines and wanted to try it out.

The usage is pretty straight forward: click the command, select the element you want to be "transparent" and then select the element(s) you want to be visible. The result should look something like this:
See the dashed line? Cool, eh?

Well, my colleague also tried it, but the dashed lines would not show up on his screen, even though it was the same file with the same view. Strange.

Even more strange: when printing the view, the lines appeared.

After some searching we found that he had Use Hardware Acceleration in his Options enabled, while I had not:

So, should you find yourself not seeing something on screen that you know should be there, play with this setting. It seems that there are still issues surrounding it.