How to Enlarge the Text on Your Computer. Over the course of the day, as you read email messages, check spreadsheets and write letters to clients, your eyes will probably want you to take a break.

Place your index and middle fingers on the iPhone screen, holding them together while you touch the screen. Spread your fingers apart to make the text and images on the Internet site larger.

A handy tool for presentations, demos and even accessibility, ZoomIt lets you zoom in on the screen, mark up the current page, and even capture your screen activity.