I was just reading on Brett Terpstra's site and he reviewed Tree:
http://www.topoftree.jp/en/tree/
I've never heard of Tree. Have no fear! OO4 wins in my book! That said, I really do like that horizontal layout option. The review's I've read point out that this gives it more of a mindmap look and feel, and by golly they're right! I like that option.
Is there any chance this is a view you can add to OO in a future upgrade? I suppose I can always export my outline and view it in NovaMind or another mindmap app, but the thought of a quick button click to toggle the view seems intriguing.
Just a thought.
Thanks and regards,
Keith