Hmmm, Actually I do want the change to affect the entire document. I want to avoid making formatting changes manually and make all my formatting changes directly to the style (that's good practice isn't it?).

I'll try and add some detail and proper terminology to my question.

I have a style Heading 2 that is applied to all headings with 2 numbers (1.1, 1.2, 3.4 4.2 etc...)
I want all of the x.2 headings to start on a new page (1.2, 2.2, 3.2, 4.2, etc. throughout the entire document) because in this document the x.2 section is always starting very near the bottom of the page. But if I change the Heading 2 style to start on new page then it changes not only all of my x.2 headings (which I want to change through the entire document) but also the x.1 and x.3, x.4 headings will change to start on new page (which I don't want)
So, how can I do a style change (not manual change to the format) that will make all x.2 headings (1.2, 2.2, 3.2, ... 15.2) start on a new page while leaving x.3, x.4 x.5 not starting on a new page.
Can I have a different style for x.2 headings than the current Heading 2 style? Will the numbering keep going in order if the headings are in different styles?
Can I change my heading 2 style so that it will start on a new page when it is beginning near the bottom of a page (but no need to start on new page when starting near middle or top of a page). Maybe by having the heading keep together with the following paragraph or something?

Thanks,
Drew