The Rotator behavior is to hold any view that is provided in the ItemTemplate either Image or any Entry, Button controls. Also, unlike ContentView, Rotator control will be holding multiple views which may have different layouts and different sizes.
So, based on a single image loaded we cannot shrink the control as that will affect other views. So, if we are maintaining common image sizes, we can manually set the WidthRequest and HeightRequest based on the Image used.
If you still face any difficulties, please check and let us know.
Muneesh Kumar G.