Every email sent is different but certain emails can be standardized, usually known as Email Template or Standard Reply.
To access the Email Template list, go to:
Home > Settings > Email > Email Template
DocType Associated: (optional) The DocType associated with this template.
You can use this Email Template in the Emails that are sent from OneOfficeERP in the "CC, BCC & Email Template" field of the email section of the document. OneOfficeERP will fetch the subject and response as per the template selected.
You can set a Default Email Template for each document type via Customize Form.
The fieldnames you can use in your email template are the fields in the document from which you are sending the email. You can find out the fields of any documents via Customize Form and selecting the document type (e.g. Sales Order)
Use HTML check that you can toggle to switch from the text editor to a code editor. This allows finer control over the body of the email and makes it easier to use for features like loops in Jinja.
Templates are compiled using the Jinja. To learn more about Jinja, visit this page.