How to view objects with a subsurf modifier more simply? I am doing this tutorial. From about 16:00 till 21:00 min he is modelling the first part of the screen resulting in this:



When doing this his viewport in right view looks very simple and more handy than mine:



When I am in right view my screen looks like this. How can I get that same viewport view ? 

And ... I really have great difficulties to follow this tutorial from 16:00 - 21:00 min ... but would like to get it done. Ideas ?
You can check 'Optimal Display' on the subsurf modifier to simplify the view to not show the new subsurf faces:



This has to be done on every object you want to view simplified. You can do this by hand or by selecting all the objects you want to enable 'Optimal Display' on, enabling 'Optimal Display' on one of them and then right clicking on 'Optimal Display' and choosing 'Copy To Selected'.