In the Stage mode, G3, G3 360 and Free Bone characters' motion can be created by using the 2D Motion Key Editor.
Choose the Selected Part radio button and click the Reset button to reset the transformation of each bone of a bone (IK) chain.
Selected Part is selected
Reset is clicked
Choose the Full Body radio button and click the Reset button is used to reset the transformation of every bone of the character.
Full Body is selected