Map mode withoutht "Prt Sc" key

Hi!

I've been using a Surface Pro 3 with my Nano hog for a while now and it's been great.
One small issue is when I've wanted to use the Surface with the Nano interface, I can not use 'Map' mode as the touch keyboard does not have a 'Prt Sc' key
Is there anyway to change the mode without this key?
If not, could such a capability be built in?


Gordo