split view with context

i generally use vi for c code browsing. i've observed that
at any time half of my screen is not used. so is it possible
to split the screen vertically in to two and in the second
window display the next-page contents (with some context).
this would help me to see two pages at once. the real trick is
to make seamless browsing for example if i move a page down
the content in the second window should move page down as well.
i hope i am clear.

thanks

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