Depending on the operating system that you are using, you can hold down the CTRL key (Microsoft Windows) or the ‘Apple’ key (Mac OS X) on your keyboard, and: Press the + key to increase text size, repeat until the desired size is achieved Press the - key to decrease text size, repeat until the desired size is achieved You can also scroll with your mouse wheel to make text bigger or smaller Press the 0 (zero) key to revert to the default text size