Shows the preferred pose for all selected bones.
The preferred pose is an attribute on a bone that tells the solver the most likely pose the bone will be in.
This command shows the preferred pose by setting a key at the current frame representing the preferred pose on all selected bones. Executing this command does not change the skeleton or its properties in any way; it's just a means of visualizing the preferred pose in the 3D view.
// Show the preferred pose for all bones in the scene.