Completing a record and assigning to a worker for completion
When completing an action, one of the fields is to assign the action to a person. To complete this see the 'how to create an action' article and follow the steps. This article can be found here.
Reassigning an action
If you wish to reassign an action, the reason for this is the original person it was assigned to has left the company or the wrong person was select, as examples. To complete this see the 'how to update an action' article and follow the steps. This article can be found here.
It's that easy.