Reply to Email in Thunderbird with the Quote - Quote Above

The following guide provides a clear overview of Thunderbird, with the most relevant background, details, and practical takeaways.

Thunderbird Overview

First, you select Tools> Account Settings in Thunderbird:

Select dedicated settings for each account and select Composition & Addressing:

Check the box Automatically quote the original message when replying and select start my reply above the quote in the Then. Section. Then click OK:

And from now on, all emails replying with the quote will display as follows:

Good luck!