Is it possible to make so we write the notes in the main windows  instead of the little "pop up" window.. it would make a better overview when writing notes :) 

Or just open the device text editor (pretty much all of them have such) and type there. When done copy and paste into the box?

I prefer my campaign/character notes to be separate in a google docs, just because it makes it easier, I get formatting, it's easier to search, and much easier to read than on a character sheet page which is not ideal for notes regardless of which window.