If I change a Helper layout, will it change where it's used?
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes, the generated templates can be saved to the database.
Opacity is set using a decimal where 0 is transparent, 0.5 is 50% and 1 is solid.
Modifiers allow you to apply styles to an element when a specific class, id or attribute is present.