Kenn, there isn't a XP&GDv20. You image also is showing an early UI so I think you have XP&GDv19 or earlier.

It may be unfortunate that the Help seems to show you have the capability but Page Numbering has never been there for XWD or XWDP either.
It is poor product filtering on Xara's part.

The killer is https://helpandsupport.xara.com/xara...ert_menu.html:
Page number (Designer Pro only)
Inserts a page number and specifies its position. See Adding page numbers for more info.
The main giveaway is you will not have any Templates with page numbering added.

Have you not looked at the earlier Posts offering suggestions on how to gain a page-numbered template?

Acorn