Try holding CTRL and hitting the + key until type is as large as you want. CTRL and - makes it go back down.
What operating system do you have? If it's windows 7, go to your start menu, select control panel, and then Ease of Access Center. There will be a screen magnifier, or click "Make the computer easier to see" to see different options. I'm not sure what it is in other versions of windows, but look for things like Accessibility or display options in the control panel.