Thanks for this reply, you are right of course !
Now this said, I am able to make the designer and the "real" device the same.
One problem remains though: the views are adapted nicely, but the TEXTSIZES do not adapt to the smaller screen, so I had to define the textsizes for each text individually for each screen ?
Sounds strange, according what I read they should be autoscaled as well, isn't that so ?