There is a good chance that the act layout you use has a lot of vacant space that surrounds it.
When people think about upgrading to the newest version of act I often tell them that sometimes it’s the little things that makes the effort worthwhile. In this case, act has a new layout that comes with Act 17. This layout takes full advantage of the larger monitors we use and the ability to have a larger screen resolution. Take a look at the new act 1366 x 768 layout.