Edit a Link
Step 1:
Inside a Jira issue, find the link you want to edit and click "Edit" from the link dropdown. A form will appear inline, allowing you to make changes.
Step 2:
Update the Embedded URL with the link to your Dropbox design and assign a meaningful Title for the design if desired (optional).
Step 3:
Click the save button again to add your Dropbox link to the Jira issue.