PJC wrote:

I want to change the default so that it always is size 8 font. I
don't want to have to change it each time.

ToolsOptionsMail FormatFonts. The "When composing a new message" font
controls this. Of course, it will also affect any Plain Text mail message
you compose as well as the notes pane of a new contact, a new task, or
journal entry. It affects the notes pane of any form that has that pane.
--
Brian Tillman