Increase the Font Size While Reading Mail in Outlook

To read mail in a larger font in Outlook:

Double-click the message to open it in a separate window. Go to the Message tab. Select Zoom. Select the Percent up arrow to make text larger or select the Percent down arrow to make the text smaller. Select OK.

What to Do When Increasing the Font Size in Outlook Doesn’t Work

Some emails specify the font in a way that cannot be changed.

If you receive emails with fixed-size fonts, use a display lens such as the built-in Magnifier in Windows or the free Virtual Magnifying Glass application.