question about default keyboard in multiwindow

Hi friends, i use multiwindows a lot... have a galaxy tab s 8.4 as a phone (yes, its crazy but works great...) and when starting apps in multiwindow when have to type always starts floating keyboard.... i hate it !... every time have to go ... and chage to fullscreen keyboard (normal keyboard)...
My question is, is there any way to set full screen as default one?
Thanx in advance