Do I have to use IMCE?
No. Acquia Cohesion allows the site builder to select, either use of IMCE or Entity browser for browsing and selecting images.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
You have to upload a JSON file to provide the index of the icons within your chosen icon font.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.
Opacity is set using a decimal where 0 is transparent, 0.5 is 50% and 1 is solid.