Do not forget, that in a previous post of mine I had mentioned How To Set Microsoft Outlook into Dark Mode, post that you can find here. The only way to permanently adjust the size of the text in the reading pane is to adjust the display scaling or zooming the reading pane.
To find out how to set Outlook into Dark Mode, just keep on reading the post below. Select the font options that you want to use.
Found insideExperience learning made easy-and quickly teach yourself how to create dynamic presentations with PowerPoint 2010.