[Scribus] Scribus x,y co ordinates

[hovergo at net-tech.com.au]

Open a new page.
Top left corner is x = 0, y = 0

One of my newsletters, this edition, for some reason has the top left
corner page coordinates at x = 7, y = 35.5. the page is a copy of one
from an earlier version of Scribus.
It makes distance calculations awkward and I can find no way of setting
it to 0 0.

Can anyone help please.
Roger