Administrator Guide
How to set up Custom Fields: Issue Picker and add extra fields into your issues?
Step 1. Go to the Jira Administration tab and select Issues section.
Step 2. On the left side, menu panel find FIELDS tab and click Custom fields.
Step 3. Click Add custom field.
Step 4. Select the Advanced tab. Then choose from the next field types:
If you want to allow users to link multiple issues, then select Issue Picker (multiple issues).
ORIf you want to allow users to link only a single issue, then select Issue Picker (single issue).
Then click Next to submit the selected custom field.
Step 5. Enter the desired Name and Description of the custom field, then click Create to submit entered data.
Step 6. Associate Multi-issue picker field to the needed screens by selecting appropriate checkboxes.
You must associate a field to a screen before it will be displayed. New fields will be added to the end of a tab.
Then click Update.