There are many ways to fill up space.

Let us say, for example, that you have a paper due which is to be two pages in length.

Yet you have only a page and a half worth of viable information.

What to do?

You can get on the computer's thesaurus and find replacement words with additional letters.
You can increase the font size.
You can decrease the margin size.
You can reiterate the question.
You can decrease the size of the paper.
You could write a note to the professor on the bottom of the second page thanking him/her for the opportunity to think about the subject.
You could just do more reading and thinking thus amassing more viable information and write a full second page from the results of your study.

And that's what I'm thinking about.