I answered in General too, but I'll post here too.

Through PC: At the top of the screen toward the middle you should see "Gabby2007's Profile", click on that and then toward the bottom you should see "display prefferences". From there you can change the "skin" (second option), and there are a few "large font" ones to choose from.

You can also change all website fonts through your browser.

If you have internet explorer it should be view, then text size, and choose the size you want.