The Copy Value From Other Field post function copies the value of one field to another field. You can configure any number of source/destination field pairs. In addition to copying values from fields, this post function can also copy from/to comments.
The copy operation can be performed either within the same issue or to/from a related issue.
You must specify the relation between the source and destination issues for the field to copy. Then you can add any number of from/to field pairs for the copy operation.
Perform As User
See also Supported Field Types, below.
A workflow is configured so that the 'Resolve' transition has the 'Copy Value From Other Field' post function. The function is configured to copy the value of the 'Assignee' field to the 'TextField' field. If a user resolves an issue on this workflow, the value of the 'Assignee' field will be copied to the 'TextField' field after the issue is resolved.