[Pro Version Only] 1 Generate Ragdoll If you have a skeletal model selected, this button will generate a basic ragdoll to fit it. This will not generate a good, accurate ragdoll, it is used as a handy quickstart tool. 2 Select Root Bone Selects the root bone of the selected skeletal model. 3 Align To Bone Position If a bone and one or more objects are selected, this will set all the objects to the exact position of the bone. Especially handy for positioning joints. 4 Selected Primitive Type   If you have a primitive selected, then this tool allows you to change the shape of the primitive without messing up the rest of the scene (eg joint and actor attachments, settings...). 5 Selected Joint Type This is the same as number 4, except it allows you to change joint types without detaching them or changing any settings. 6 Bone Thickness This is a visual aid only. It alters the thickness of all bones displayed in the editor.