This is unusual to number paragraphs and restart them relative to the page they sit on rather than the logical structure of the content. You would need to reset the content continuously with any changes in pagination which is a continuously repeating process.

Are you sure you don't really want Line Numbering? This can be very simple to implement and will be much more robust in restarting on each page. See How to Add Line Numbers to a Microsoft Word Document

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Andrew Lockton
Chrysalis Design, Melbourne Australia

It is unusual. To give it context:

I'm the creator of a set of long-standing Word templates called "Script Smart" for writers (well, for me - but I share them with other writers too) to help format scripts for films, stage plays and radio plays correctly. This particular issue is related to the "Radio Play" template. In standard radio play script format, all dialogue cues are numbered but restart from "1" on each new page rather than being consecutive throughout the script. It's just part of the standard production process.

The line numbering function would indeed solve the problem if character names appeared on a separate line to the dialogue (as with screenplays) but, in this case, they both share the first line (CHARACTER NAME [tab] Dialogue), so the style is a paragraph with hanging indent.