Dashboard Sort Pages

Good morning!
I guess it's always the strange questions at the beginning...
But how do I sort the pages in the dashboard into main and subpages.

/Start
/Topic a
/ Sub Topic a
/ Sub Topic a 2
/Topic b
/Sub Topic b
/Sub Sub Topic b
/Imprint

Thanks for any advice.
Best wishes for the day
Oliv

And another round a found a way for my own question.
Dashboard / Pages / More (Option) / Move Page ...
That works for me.

How can i mark this Question as solved?
Cheers