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.
There is no known SVG module that can be used with Acquia Cohesion.
Opacity is set using a decimal where 0 is transparent, 0.5 is 50% and 1 is solid.