I understand some of Blender’s basics, like navigation and placing objects. I am struggling when it comes to a different type of rigging I do not recognize, though. In the pictures below, I am not familiar with the boxes and rings around the model, which came created through Auto-Rig Pro. I know that the legs need proper lining up at least. I see this form of rigging from several models, not just from only Auto-Rig Pro. Where would I go to learn about this type of rigging? I do not know words to use for searching.
Thank you for your insight!