[O] How to get "Wrap at Window Edge" in org-mode?

[Marius Hofert]

Hi,

I am working with Xubuntu 12.04 on a MacBook Air (4,1) with org-mode version
7.8.09. I use the following code to get "Wrap at Window Edge" in
org-agenda-mode:

,----
| (add-hook 'org-agenda-mode-hook
|         '(lambda()
|            (if truncate-lines (toggle-truncate-lines -1))
|            ))
`----

How can I get "Wrap at Window Edge" in all .org files? The only idea I found is
https://plus.google.com/u/0/113859563190964307534/posts/RVBN7KvQtB7 but that
unfortunately did not work.

Cheers,

Marius