I have found that the summary data tags take up the whole width (600 px) of the email, so I put them in their own text widget. Then I change the spacing of the widget to zero. That keeps the width of the email from spreading to accommodate the wide tag. I also set the spacing around the header image, which I upload at 600px wide, to zero. Hope that helps. Let me know if you need more explanation.
Covington Meetings & Events
firstname.lastname@example.org · www.covingtontravel.com
P: 804-747-4138 · F: 804-747-0572
4800 Cox Road, Suite 200, Glen Allen, VA 23060
BCD Travel Affiliate and Virtuoso Member
Let Us Take You There.