Why can I create more than one Acquia Cohesion template for the full view mode?
You can create more than one template to provide layout and style alternatives with the use of the template selector.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
The 'Range' in the menu list item element sets which list items at the current level the settings should apply to.
Yes, you can build mega menus using Cohesion. Building mega menus requires advanced knowledge of jQuery in Acquia Cohesion and CSS.
Running the composer update command will update any composer packages that have newer versions available.
Google maps may not be showing if you have not set a Google maps API key.
The Youtube video embed is responsive so it should expand to the width of its parent. If you do need to set a width you can apply the Width CSS property through the Style Builder.