Rated 5 out of 5 stars

yazan: ChrisGn tarih: Nisan 24, 2017 ·

This is an absolutely must have brilliant add-on. Unfortunately since updating to the latest version of Thunderbird (52.0.1), the Arrows to control which Folder Pane is viewed have disappeared.

This review is for a previous version of the add-on (1.11). 

yazan: Jonathan Kamens (Geliştirici) tarih: Nisan 25, 2017 ·

UPDATE: The arrows are back in this beta release:

https://addons.mozilla.org/en-US/thunderbird/addon/folder-pane-view-switcher/versions/1.12beta2

Give it a try!

Original response:

Please read "About this Add-on" at https://addons.mozilla.org/en-US/thunderbird/addon/folder-pane-view-switcher/.