The compiled add-in can be found here: Latest release. The add-in file ends with .esriAddinX.
Loops through all maps in a project and sets their extents to that of WA. This makes it so that when you click the zoom to full extent button, the map will zoom to WA rather than the default whole world extent.
Eastern_Washington_map.svg: *Map_of_Washington_counties,_blank.svg: David Benbennickderivative work: Admrboltz (talk)Flag_of_Washington.svg: WA Secretary of Statederivative work: Fry1989 (talk) 23:00, 10 April 2011 (UTC), Public domain, via Wikimedia Commons
