The first step is to add a "simple text" field that will be used to collect the entry of the recipient's email address.
Configure automatic email
Then you select the "Automatic Mail" field. In the field properties, you will define:
The button label
The recipient of the email: in the drop-down list, the simple text fields of your script will appear. It will therefore be necessary to select the field where the recipient's email address will be entered.
The email template: select the email that will be sent from the list of available templates.
The subject of the email
The name of the sender
Reply to: on which email address your contact can reply to you
Preview of the email sent
The Test button is used to check that the desired configuration and display comply with your request.