After creating new Activity Type either Task or Communication, I cannot see them in the Option for new Task or Communication. Even after the Caches cleared, the Task remains empty and Communication shows the 4 basic options (Email, Follow Up, Meeting and Phone Call). Is there something to add in the database ? Thanks for the help using this great new CiviCase ;-)
Silly of me. I forgot about the very clever and granular way that CiviCRM is built. Just creating a new Activity Type was not enough to have it activated in the right CiviCase. After creating a new Activity Type (either Task or Communication), we must add these new Activities to the right Case Type that can be customised. And voilà, it's set !