There are a few ways to increase or decrease the web pages you are viewing.

If you have a wheel on your mouse, click anywhere on the web page and do the following:

Hold the CTRL key down and then rotate the mouse wheel button backwards and this will decrease the size of the page or

hold the CTRL key down and then rotate the mouse wheel forward and this will increase the size of the page.

OR

With a mouse - Click the Magnifying glass icon at the bottom right corner of the Internet Explorer window.  Or, select the arrow to open the list of options and select one.

Keyboard actions - press CTRL + Plus Sign (+) to zoom in, or CTRL + Hyphen (-) to zoom out.