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 inbound messages.
From the composer
In the composer, click the canned response icon to open the menu, and find the canned response you want to edit.
When you hover over the canned response, you will see a preview of it to the right. Click the 3 vertical dots on the top right of the preview, and click Edit in Settings.
You will be taken to the Settings and into the editor for this canned response. Make any edits here and click Save.
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).
Find the canned response you'd like to edit by typing in the search or by scrolling through the list. Click to open it.
Make your edits and click Save.