X-Ray Mode. When I first heard about the X-Ray Mode I thought that it was most probably a little bit of a gimmick. But actually, when you need this it is really useful.
Let’s say that you have drawn several objects that are on top of each other, i.e. some are hidden behind others. In the past you had to change the order or had to turn off classes to access the hidden objects. Now you have the X-Ray Mode.