Why aren't my base styles updating in the preview?
If you're removing styling from a base style, those styles still apply until you have saved the base style.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Base styles are CSS styles for HTML elements.
Yes, you can use Drupal fields in certain parts of Acquia Cohesion.
You can create more than one template to provide layout and style alternatives with the use of the template selector.
It depends on the use case. For fields and their field formatters use a 'Field' element, for data without field formatters, use a token.
Opacity is set using a decimal where 0 is transparent, 0.5 is 50% and 1 is solid.