You can email a customer via the MEMBERS area.
Click this to compose a new email.
You can apply additional options / actions to the email via the checkboxes
Click the link to create new responses or a signature or manage existing ones
Changes made to the signature area will save for next time you create an email.
If you want to create re-useable responses to send out with the email click the CREATE CANNED RESPONSES link indicated in the image above by [C]
The responses can then be edited via the same link once created,
To apply a canned response click the checkbox next to the response in the area indicated in the image above [B]
The response will be included below any custom content you add to the MESSAGE area.