To assign an action chain to an employee, you need to apply an existing scenario (template) or create a new scenario and apply it.
You can familiarize yourself with the process of creating a scenario (template) in the article "Automation. Script creation (templates)".
After that, you need to select the employee or list of employees for whom the action chain will be launched.
After launching, the action chain will be displayed in the "Activity" tab at the top of the list.