Adjust

Internet Explorer
Click on View from the top menu and move down to Text Size. You can now change the text to one of the five sizes - Largest, Larger, Medium, Smaller and Smallest. (Refer image below). Internet Explorer lets you change the font size to only one of these five values.

Firefox
From the View menu, choose Text Size and then select whether you want to increase or decrease the font size. (Refer image below)