Replying to Neat Way to Make Term Papers Longer

I'm in the library today during 3rd hour, and I started screwing around on Microsoft word, seeing if I could change my AP US History Document Based Question from four and about 3/4 pages, to five pages. I found out that if you typed the paper in size 12 font, then you go to edit/replace, then put in a period in the first box, put a period in the second box except go down to font and change it to 15, it changes every period in your paper to size 15 font, which visually doesn't look like any thing happened, but added 1/2 a page to mine! ( Just thought I would pour out some of my MS Word 40 Ounce for some of my fellow brothers in the struggle)