HCM Person EIT Information to be view only for Employees and Line Managers

Summary:

I have created an HCM Person EIT Information structure (PER_PERSON_EIT_EFF) to capture training history. We would like this structure to be view only for both employees and managers, but HR Specialist should have update access.

I have read the Configuring and Extending Applications user guide, and it states: "Determine what privileges to set for view and edit access to context attributes, such as providing all users with view access but only managers with edit access" - which work for us, however I cannot find documentation on how to create an 'action'

"If no action is preconfigured, a security administrator can create actions and policies to support access control on the extensible flexfield attributes."