...
Rename - click on the name of a custom field to rename it. Rename is a safe activity which means that the name of the custom field will be updated in all dependent configuration elements referring to it by name.
Configure - redirects you to the custom field’s configuration page in Jira.
Edit - redirects you to the custom field’s edit page in Jira.
Delete - use it to clean your Jira from any unused workflows. Power Admin allows you to delete a custom field and/or shows warnings if it is currently in use.
Export - exports custom field usage information in a CVS CSV file.
Locations
Using the Locations feature, you can find detailed information regarding where and how the custom fields on your Jira instance are used in agile boards, filters, dashboards, workflows, permissions, and events.
...