Adding page numbers

[helios]

Scribus 1.5.6.1 on Linux Debian, I'm a first time user. I tried to add page numbers to document, but process looks the process looks confusing and unclear. I have to add the number to the first page first and manually center it on the page. There is a black border around number, and I'm not sure how to automatically center it on the page.
How to add page numbers automatically, similar to Word document? Please specify detailed steps.

[RodneyLee]

http://wiki.scribus.net/canvas/Help:Manual_Pagenumbering