Everytime I compose a new email, the new message window shows a very big letters. For example, I can only see 6 English words in my 22″ monitor. The font I use is Aerial size 10. This is very annoying as I just cannot see my message clearly. I have tried to turn off anything in Accessibility and it didn’t help. When I read email, then every thing is normal.
Sounds like your zooming factor has been set above 100%. You can change it back in the following way;
When composing go to the Format Text tab and click on the Zoom button.
Previous versions of Outlook
You can only zoom when you have Word set as the email editor. The Zoom function can be found in the View menu.