In Fireworks, or Photoshop, or GIMP your layer list also includes the objects within each layer. I've just started exploring Inkscape and can't seem to find this functionality. Some googling reveals a few people asking for this feature 5 or 6 years ago but nothing recent.
Can I view objects in Inkscape outside of the raw XML viewer?
Layer Trees > Oak > Red Maple > dPine > Palm Layer Structures > Barn > Driveway > Mailbox
Ideally I'd be able to show/hide and lock/unlock objects within that window just like you can in PS, FW, and GIMP...