3 - Customize look & feel of custom fields
The next step in configuring a connected custom field consists in setting up how the data retrieved from an external source will be displayed in your Jira work item.
Template
Templates define what is displayed after the data is retrieved.
Process:
A query retrieves a result set
A template formats it into text or select options
For select lists, you can use the following template:
${row.name}
For read-only fields, you can use the following template:
${data.name}
Learn a lot more in our Template guide.