Message for sending notification in Lead Doctype

i want to send notification when user add comment in lead means save or edit notes

so how to fetch value of child doctype “CRM Notes”

Customer Name: {{ doc.lead_name }}

Notes: {{ doc.???????????? }}

Any one have suggestions ?

You need to set up a Notification document for the Comment doctype. You’ll need to work out the settings you need for it to trigger only when you want, and you’ll have to format the email as well.