Remote display page scroll

Using either the PV450 or PV485 displays I would like to configure either a digital or analogue input(depending on display) to switch page views on the display. This is so instead of using one of the normal keys on the display itself I can have a remote switch but still have control of what the user is seeing displayed.

I'm not very experienced using Powervision or indeed with programming but just to check if what I want to do is possible and then a rough idea/overview of the process I would need to follow would be really useful.

Any help would be appreciated