The old eyes are giving out, eh?
RTFM.
Under Options, choose Mail Format tab. You can make changes there.
I have Office 2013. It is better then 2003. The cost is not much as you will not be upgrading for another 12 years : )
Windows XP and Vista NOT supported. Office 2013 is one time cost. Office 365 is a perpetual subscription of $99 a year or $69.99 if a student.
Compare. Some versions do not include Outlook.
http://www.microsoftstore.com/store/msusa/html/pbpage.OfficeCompare
Office Home & Business 2013 does include Outlook $219.99
Microsoft has the same product in different packages with some as subscription and others tied to 1 pc only. If you have a student or you have a school id then you can pay much less.
Your company may also qualify you for a huge discount.
Office Professional – Buy the DVD for about $30 w/tax instead of the download $9.95 which you cannot save.
This version is the full version. You would need a program code from your company. Enter your work email to see if you qualify.
http://www.microsofthup.com/hupus/home.aspx?culture=en-US
Outlook 2003
http://email.about.com/od/outlooktips/qt/et_default_font.htm
Or
http://www.howto-outlook.com/howto/fontsizecolor.htm
How can I change the font settings for the Navigation Pane?
http://www.msoutlook.info/question/513