[Evolution] How to edit/insert html code

[jonathan mercier <jonathan mercier fr gmail com>]

Dear,

I would like to customize my HTML mail, but I have not yet found how to
edit the html generated code or to insert mine 

With thunderbind this can be done withe the add-ons:
https://addons.thunderbird.net/en-US/thunderbird/addon/thunderhtmledit/?src=cb-dl-toprated

Thanks for your help

best regards

jonathan