When I send or receive a new email, the format is just fine to me. The email covers the whole page.
After many replies to that same email, the original email message from the "show orignal message" is now "shrunk". It's like there is a narrow tube and the email has to fit inside that tube.
For instance, I click on my email message with 30 replies. the orignal email message (the first one on the bottom of the email) is now:
On Jun 14,
How do I change the settings so the previous email message covers the whole page again?