Xamarin.Android: Set size of PDF viewer

I'm creating a simple application as a prototype to see if RadaeePDF fits the needs of our product.
We need to display a PDF-file alongside other UI components. However, I cannot seem to find a way to prevent the PDF-viewer from opening the pdf in full-screen.

Is it possible to make the PDF-viewer take up only say half of the screen?
Our application is written in C# using Xamarin.Android.

Any help is greatly appreciated.
Best regards
Jonas