different themes for desktop and mobile

Hi all,

We are building a desktop app in Mendix. This has a corresponding desktop theme.
Now we also want to give the users some mobile pages. these will be slimmed down and different page versions of the desktop.
We also want to use a different theme for these mobile pages.

So my question is, what is the correct way to use two seperate themes within a application.
One theme for desktop usage and one for mobile usage.

Thanks,

Martin