What is the correct way to show a substack window?

[Tiemo Hollmann TB]

Sorry for this newbee question:-)

I just want to show (open) a substack as a new window (as toplevel). I
thought, I just have to code: show stack "myStack", but nothing happens.

I have to add: go card "myCard" of stack "myStack" to see the substack. But
I don't want to "go" to that substack and get the focus on that stack. I
tried it also with the visibility, what is obvious the same as "show"

I think I am missing some basics

 

Thanks for any hints

Tiemo