SueySuey  --  It depends on what you have.  I have Windows 7.  I press and HOLD the Ctrl key while rolling the mouse wheel.  Roll the wheel forward (while holding the mouse still) to make print larger, roll it back to make print smaller.  You can also do this: 

To increase/Decrease the font sizes on MSN Browser please follow the steps mentioned below:

a. Signin to MSN, at the very top click on View.

b. Under View, Click on Text Size and you can select Largest/Large/Medium/small.

c. Once you done it now you'll find the difference in font size on MSN home page.