What does 'Range' do in the menu element?
The 'Range' in the menu list item element sets which list items at the current level the settings should apply to.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes, you can build mega menus using Cohesion. Building mega menus requires advanced knowledge of jQuery in Acquia Cohesion and CSS.
No, the entity browser does not work for component defaults as the entities are content, not config.
Google maps may not be showing if you have not set a Google maps API key.
Yes, this is possible by creating a custom element.