Joints are the base objects to build a skeleton. They are organized in a hierarchy where you usually start with the pelvis. Hereby it is important that the hips are always the children of the pelvis, the knees are the children of the hips, the ankles are the children of the knees, and so on. So that if you rotate the hip also the knee, ankle and so one will follow its movement. Here you can see a small example of how the different joints are organized in a hierarchy.

Properties

• Type: There are two joint types.
  • Normal: If a joint is set to "normal" a bone will be drawn between the joints and its parent if the parent is also a joint.
  • Root: If a joint is set to "root" there will be no bone drawn to its parent. This type of joint is often used for hip or the shoulder joints.

In this image the hip joints are set "normal".		In this image the hip joints are set "root"

Display mode: Sets the shape of the bones. By defaults there will be drawn just lines between the joints. But you can also use the quite popular diamond shaped bones.

line mode		diamond mode

• Color: Use this property to the color of the joint and the bones starting from that joint.