How to edit a canned response
Canned responses can be edited at any time. If you haven't gotten around to creating a canned response, we highly recommend you do, as they allow you to respond faster to incoming emails.
Go into your Settings and select Responses (to edit team responses, which are shared with your team) or My responses (to edit individual responses, which are private to you).
Here, we'll edit a team response.
Find the canned response you'd like to make changes to in the list. Click to open it.
Edit the text, and click Save.