Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No, there is no way to roll back an Acquia Cohesion package import.
Yes, you can build mega menus using Cohesion. Building mega menus requires advanced knowledge of jQuery in Acquia Cohesion and CSS.
With Acquia Cohesion Sync you can export Acquia Cohesion configuration in full or in part as a package that can be imported into a different website.
An Acquia Cohesion Package file is a .yml file that contains Acquia Cohesion Configuration. The package file allows you to import and export between environments.
Custom styles are CSS styles for classes.