Table created by RE Casper – Information attained through DPreview.com

Here, I have put together a table more clearly representing the features you can program to each customizable button on the Olympus OM-D E-M5. 

Refer to this image when you need to quickly review what can or cannot be used with the Fn1, Fn2, Rec, Down Arrow and Right Arrow buttons.Please be aware, the L-Fn button on select Olympus lenses will allow the general features available through the Fn2 button, with the addition of “AF-Stop.”While limited, the OM-D seems to offer customization options that will easily fit the workflow and style of most photographers interested in the EVIL form of digital cameras.

I hope you find this handy is some way.