How do I set up my email notification to be displayed horizontally?

When I receive a submitted form, it looks like this in the middle of the page with a 3 inch border on each side.  I would like it to use the entire page horizontaly (as it does when you preview the form when building it)

The email template displays vertically by default, but you could edit it by going to the settings tab, emails section and clicking on the edit button of your current notification: 

You will be able to edit the email template there: 

I hope this helps.