Difference between jit.window and fullscreen (multiline text)

Ptyx's icon

Hi,
I don't understand — when I'm working on multiline text — why the interline spacing is bigger in fullscreen mode than in my jit.window. Is there any reason ? Is there any solution to have the same effect in both modes? (And what is the real system of coordinates' values in the jit.gl environment?)
Thanks a lot for any answer..