How to find where a custom field is used in Jira Cloud
Find which projects, work types and screens use a Jira Cloud custom field, and whether it holds data, using the Fields page, JQL and the REST API.
Jira Cloud admin guides
Step-by-step answers to Jira Cloud admin questions, using Jira's own screens, JQL and the REST API.
How to find unused schemes in Jira Cloud
Find Jira Cloud workflow, permission, notification, screen and other schemes that no project uses, with the Jira UI and the REST API calls for each type.