I recently got my Nexus 7 and have got 5 home screens. Now I just like the one main screen and want to remove others that I don't use. Touching the little dots on the screen just swipe between them.
How to remove/delete unused Nexus 7 home screens
* Place two fingers on any home screen and drag in a counter clockwise direction. All home screens will show up. Then drag a unused screens to the trash. Not working on Android 4.1 Jelly Bean.
* Use Apex Launcher to create a customized homescreen. You can custom homescreen grid size and pick how many screens you want.