Translations:Mutt/13/en

Last but not least, there is the  USE-flag. It enables an extension to Mutt that can show a navigation pane of available mailboxes on the left hand side of the screen. While this is not a recommended feature for absolute newcomers (it is nowhere mentioned in any official docs, since it simply isn't official), more experienced users might like its functionality. Luckily, just enabling the USE-flag doesn't make it visible at all, meaning you don't even notice it's enabled.