How to Add Grid Custom Field to Field Configuration Schemes
This page describes how to add a Grid Custom Field to Field Configuration Scheme
Open Fields page in Jira admin settings
Search for your Grid Custom Field by entering its name
Click the Actions button for the Grid Custom Field and select View field configuration schemes
Click Add field configuration scheme.
Select the checkboxes for the Field Configuration Schemes you want to add the field to. Then click Add to {n} field configuration scheme(s) button
Result: The Grid Custom Field is successfully added to the selected Field Configuration Schemes.