According to this post, \pagebreak will end the current page and the paragraphs on the cut page will spread out over the page. However, when I tried this functionality, it does not seem to be working, am I missing something? The following is an MWE.
\documentclass{article}
\begin{document}
paragraph 1
paragraph 2
paragraph 3
\pagebreak
paragraph 4
\end{document}

\flushbottomin the preamble (or switch to\documentclass[twoside]{article}). – GuM May 03 '17 at 23:04