Select thePercentup arrow to make text larger or select thePercentdown arrow to make the text smaller.

When reading messages in the Reading pane, zoom in on an email with the zoom slider.

Or, pressCtrlwhile turning the mouse wheel over the message text area to increase the font size.

Zoom button in Outlook

you’ve got the option to alsochange the size and style of the message listin Outlook.

Text Zoom: 130% message in Outlook

Outlook on Windows 10 showing Font size dialog