You can edit Summary of an issue in the structure widget.

You need Edit Issue permission on the issue to edit its Summary. If you don't have the permission, a read-only flag is shown.

To edit issue summary:

  1. Select the issue in the structure widget.
  2. Click Edit on the toolbar, or use a keyboard shortcut: F2 or ss ("s", then quickly "s" again).
  3. Change the Summary and hit Enter. To cancel editing, hit Escape.