Adding an option for each forum that will limit the number of subforums that are displayed in the forum's legend to direct children only.

• Having a single child level is conceptually a better idea (why else would every other vendor do this), because it emphasizes the hierarchy much more clearly and can significantly reduce clutter...
• ... but some users like the current way of bunching them all together without any structure.
• So if we want to implement this, we will either need to implement it as:
  • A global ACP setting which limits the depth of the children in the legend (or no limit at all)
  • A setting that limits the level on a per-forum basis, configurable for each forum/category (or no limit at all)
  • A UCP setting so that users can set it themselves
• Show all subforums by default (same as current behavior)

http://area51.phpbb.com/phpBB/viewtopic.php?f=108&t=45585