Did you ever find yourself wondering which namespace a class belongs to? One would open the help and use index functionality to find it. Now the process is a lot easier. Just type the class name into the code and, if class is referenced and its namespace isn’t reachable, a little red box will appear at the bottom right side of the class name. This red tiny box is a huge benefit. Hover over it and it will give you two options: either include a proper using statement or prefix the class name with its namespace.
Once you try it you’ll love it.