Review for Buttons! by Kaatje1970
Rated 5 out of 5 stars
Download Custum Buttons (https://addons.mozilla.org/nl/thunderbird/addon/2707), open a mail, click on the toolbar en choose 'creat a new button'.
For previous put behind /*CODE*/goDoCommand ("cmd_previousMsg");
And for next put behind /*CODE*/
goDoCommand ("cmd_nextMsg");
To create your own collections, you must have a Mozilla Add-ons account.