Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
You have to upload a JSON file to provide the index of the icons within your chosen icon font.
You don’t have to add units unless you want to use a specific unit or you’re adding Custom CSS properties.
No, the entity browser does not work for component defaults as the entities are content, not config.