wpf. UserControl size 1280x720. It does not fit into the screen if scale >= 175% -

i create usercontrol size 1280x720, not fit screen if scale >= 175%. usercontrol size can not reduced. can done?

if can't scale or resize it, other option wrap in scrollviewer.

https://msdn.microsoft.com/en-us/library/ms750665(v=vs.110).aspx