Ok i found it…but thats funny 🙂
After i use the start button i became only this options:
Hunting
Walking or hiking (i dont now the english word for „wandern“)
Fishing
I activate hunting…the program start.
I stop it and move back.
And now the joke, here ist the options „Displays“ and i can activate the stopwatch/timer…
Bug or feature, i dont know 🙂