How To Use

1. Select Settings> Issues.

2. Under FIELDS, select Custom fields.

3. Click Create custom field. Make sure to select Advanced to view the available Extensive Field options.

Open

Open

4. Select the type of field you want to create and click Next.

5. Add the details for your field.

   The name you select appears as the custom field's title wherever the field appears. The description appears below the field when creating and editing issues, but not when browsing issues.

6. When you have entered the field details, select Create.

7. Add the new custom field to one or multiple screens by ticking the corresponding box and click Update.

8. Find the custom field Date Difference Calculator to configure and click  > Contexts and default value > Edit Custom Field Config.

9. To select the Custom Field of an option.

10. Click save.

Please refer Atlassian’s KB for custom fields configuration: Create a custom field | Atlassian Support