To get full access to Workflow Automation, Workflow Advanced Mode needs to be enabled to your account.
You can only do this by request from your Account Manager.
By default, only the basic features will be available such as Campaign Relation, the rest will be marked as WA Advanced Mode.
Under Trigger Event, only the Disposition event will be available. The rest will be marked as (WA Advanced Mode).
For Trigger Action, only Email, Integration, and Move will be available, the rest will be marked as (WA Advanced Mode)