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.
You have to upload a JSON file to provide the index of the icons within your chosen icon font.
Yes, this is possible by creating a custom element.