The font is too big (or too small) when I am creating an email

When you create an email, the font in the email is too small or too big. How annoying.

You need to change your zoom settings in Outlook.

Open up a new email.
Click on the Format Text tab above the ribbon.
On the ribbon, click Zoom.
In the Zoom dialog box, under Zoom to section, click 100% for the default size, or use the other options to specify a custom zoom size.

NOTE | When the zoom view is changed, the setting is permanent for all future messages you compose, reply to, or forward.