WPFUI 4.0.2 NavigationView Frame Stretch

[realcnk]

Hi.

In WPFUI 2 the frame stretch the page, the content adjusts to the frame size.
Same page in WPFUI 4.0.2 NavigationView it adapts to the size of the page controls, not the frame, so you have to scroll.

How can I configure the frame so that the page adapts to its size and the page controls adjust accordingly?

Thanks.

[realcnk]

Any solution?