Suppose on a webpage (accessed through a desktop browser) one has a list of news items displayed as headlines. When a user clicks on one of the headlines the full news text is shown in a lightbox-like overlay in order to put full attention to the reading experience.
My question is:
- How to design such overlay in order to provide the best possible reading and navigation experience?
On our team we are considering (at least) 3 alternatives:



However, we can't seem to quite agree as to which is better. Any thoughts?