Right now, the vertical scrollbar next to the folder list is always visible, even if the folders all fit in the height of the window. A nontrivial (from my POV) amount of screen real estate could be saved if it followed the normal behavior of hiding when no vertical scrolling apllies.
If you'd read the documentation, you'd have seen this in the section regarding hidden preferences:
Specify the policy of vertical scrollbar of Folder List. '0' is always shown, '1' is automatic, '2' is always hidden.
To alter it, shut down CM, open ~/.claws-mail/clawsrc and edit. Save file, restart CM.
You're right, sorry for that.
(In reply to comment #0)
> To alter it, shut down CM, open ~/.claws-mail/clawsrc and edit. Save file,
> restart CM.
You could also install clawsker.