How to enable design mode in flashbuilder

Question

I am trying to enable the design mode on my trial flashbuilder but could not find any option to do so,

I have checked out Windows menu but there is no enable design mode, and Preferences but there is no Flex in preferences dialog to enable its design mode.

Answer 1

Te design mode is no longer supported by Flash builder versions greater than 4.6 .

and this is the reason :

"The Flash Builder design view was built as a SWF which was compiled with the Flex SDK that was the latest at the time of Flash Builder releases in the past. As the Flex framework is now donated to the Apache Foundation, the release cycles (and configurations) of Apache Flex SDK are not in schedule alignment with Flash Builder. Also, users of the Apache Flex SDK are free to make changes to the framework (as in any true open-source product).

So, we had no reliable way to keep the Design View in the product such that it would work with new Apache Flex SDKs (it may work, but we can't guarantee it).

As a result, like Ajay mentions above, we had to take the difficult decision to remove DV from the shipping product."

check this link on adobe community forum : http://forums.adobe.com/thread/1056583

Cheers