How to change the default email template when using "Send by email" on a quotation, sales order, purchase, invoice or other business documents?
For example;
you accidentally deleted the original built-in quotation email template.
Now, when you hit "Send by email" you have to select the new email template by hand each time because the default is empty and you need to reset the default.your customer has its own custom email templates and he wants to set it as the default when hitting "Send by email" instead of manually selecting it each time.
that is a very clear explanation.
I wonder why, for a simple action like changing a default template, still in ODOO V15, the user shall go thru such nightmare...
Another approach is (1) Copy the default template. (2) Rename the original so you know it is custom, and make any edits you like. This will be the template that is the default, since it is really still the original, just with changes. (3) Rename the copy with (original) at the end, so you have it in case the one you modify is not suitable for all Use Cases. We recommend taking a copy just so you will always have a working template, but this isn't even necessary for everyone - the default template is a default, and any edits you make will persist during upgrades.