The Design View has been removed from Flash Builder 4.7. For more details, please see the FAQs at http://labs.adobe.com/technologies/flashbuilder4-7/?tabID=details#FAQ.
Hope this helps,
Adobe Community Help & Learning
Why wouldn’t include the design view in FB 4.7? Will it be included later. This was the main reason for using FB so that we can design UI quickly.
Analyst senior et Developpeur
A Jubilant Life Science Company
16751 TransCanada Hwy
Hi, Kevin -
A better place to ask questions related to Flash Builder 4.7 would be at http://forums.adobe.com/community/labs/flashbuilder4-7?view=discussions. Someone from the product team should be able to respond.