Can't find View Navigation settings

Tell me please where can I find these settings: http://wiki.blender.org/uploads/thumb/7/7e/3D_Interaction-Navigating-3D_view-Walk_Mode.png/240px-3D_Interaction-Navigating-3D_view-Walk_Mode.png
I’ve read about it in documentation here: http://wiki.blender.org/index.php/User:Dfelinto/Walk_mode but I can’t find it.

File / User Preferences / Input