Question [Q] Smaller multi window size.

I have a 2012 Samsung Galaxy note 10.1 A4.1.2

Is there a mod or app that will allow me to resize a floating multi window (pen window in the the newer devices) to a smaller than the approximate screen size of 7 cm x 11cm? I frequently use the app Quickpic in that mode but it would be helpful to get the window using up less screen space.

On the newer 2014 Note 10.1 models the window also seems limited to a similar minimum size, even though the screen resolution is much greater.

Is there also a way I can resize or remove the top window bar?

Thank you for your time and efforts