To Edit a Change Request

If you have the required permission, you can edit a change request whose status is Draft, Proposed, or Expedited.

Open the change request you want to edit in the Content pane.
Make sure that Details is shown in the Edit menu in the Task pane.
Click the Edit button in the Task pane.
The editable Change Request form opens in the Content pane.
Make your edits and click either Save or Save and Close.