This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Env bone. The Envelope display mode of bones in Blender Transferred from org en transferred to Commons by User Adrignola using de php CommonsHelper Original uploader was Gabio at org en This image is in the public domain PD free screenshot GPL English Gabio Original upload log page en Envbone Gabio bytes no