Create a CSS style with one of the properties being
visibility: hidden. You will see a line in the WYSIWYG editor but
not in the output. (No text in the paragraph with this style). Map
that style to something also used just for this purpose in Word.
That style will include Page Break Before.
The idea is similar to something I did so with a bit of
effort you should be able to achieve what you want, page breaks at
points that cannot be linked to a style or all topics, just those
topics where you want to specify something.
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