I think I understand your project. Is the text, and thus the numbering, continuous, or do you have to make the first section, say, 200 lines, and then a page break and another of 300, etc.?

You can use a simple repeating macro to repeat whichever you use, a paragraph break or a line break (note, though, check your paragraph spacing as to whether you need any additional spacing between paragraphs.

Allen Wyatt's Word Tips at tips.net has this as a suggested repeating code. As he mentions, your work will be made easier if you assign it to an easy keyboard shortcut so you can do it over and over again.



Repeating Actions (Microsoft Word)

I checked the FAQ, I hope it's okay to post a link to another site as I didn't see it was prohibited. This was one of the simpler solutions and clearly explained, and it allows you to do the repeat for all lines at once, or if you have to split them up you can employ it and vary the number for a different section.

Are you assured your numbers will align with your PDF? That seems a tricky consideration.

Best,

Ann