You can click on “View” at the top left side of your page (next to “File” and “Edit”) and you should get something that says “zoom.”
You should be able to click on the zoom key until you get a page that is the size that you want. You can also decrease the size of the page by going to the same “zoom” feature.
I hope this makes things easier for you. If you still can’t figure out how to accomplish this, just ask someone under 30 like I did.