Why is the preview in the Style builder not updating?
The style preview may not be updated because the refresh icon hasn't been toggled to the active state.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
You can only add combinators to child selectors. Add a child selector and combinator will appear in the Style tree.
You don't. You apply a Descendant selector. These use a (Space).