In the storyboard on the interface controller settings I ceck the checkbox "Full Screen".
In the storyboard I can see the full screen mode is working and the group is scaled to the entire display.
But unfortunately on the watch device it does not work. The black status bar is always visible.
The group hat alignment center/center and width and height are set to "Relative to Container"
How can I really use the fullscreen mode and not just in the storyboard?