The operating system information would help as each version of Windows is slightly different. In addition, which browser?
While in Internet Explorer, click on "View", choose "Text Size", then choose an appropriate size for you.
If the entire desktop is too big....RIGHT click on a blank area of the desktop, choose "Properties", then click on the "Settings" tab. Move the "Screen Resolution" slider to a larger number. Then click on the "Appearance" tab, and make the "Font" selection "Normal".
Hope this helps.
I don't know what I did but now some of my browser font is larger than before and it makes the screen too large to view the whole page. I have looked at every option I can change....ugh! This MUST be simple.