I'm having trouble printing a page it doesn't fit rignt to print what I want to see

I've made adjustments to the page that I want to print. I've increased the font size to allow me to be able to read my page after printing. However, when I increase the size of the page via print preview the information gets resized and some of the data that is needed is pushed out of view. How can I increase the font size and keep all of the information that I want to see kept on the pages that are going to print?