[scribus] Align object relative to other object (not to page)

[Hans Schmidt]

Hello,

I want to create some business cards with Scribus. Therefore I have
created a black rectangle with the size of the card on a A4 page, which
I will copy afterwards to fill the whole page.

I would now like to insert text frames etc. into the card. One of it I
would like to center on the card (but not on the page). Is there a way
to somehow arrange everything relative to the rectangle (Also to reset
the ruler, like it is done if I doubleclick on a text frame)?

Thanks!
Hans