Wells here's a simple back button. The one I use keeps a list of all the layouts like a web browser. This one will only go back to the last layout:
Here's where I found the fully featured 'Back Button'
I'm sure someone will have a better solution for you. Normally I have no problem posting anything I created (which isn't much) or found in the public forums or blogs. This solution came from a paid training series, and I don't feel comfortable (and it's just not right/fair or maybe even legal) to post someone's copyrighted material. It is a great training series for FM 12, I'm sure the series for 13 is just as great.
Thank You David! For anyone that may stumble upon this thread looking for the same thing, David's link is amazing, super easy forward and back button set up for multiple pages.