In the Rigid Bodies pane, click Add to create a Rigid body from the selected markers.
A. Labelled segments joined as a Rigid body shown in the Viewer window B. Rigid body added to the Rigid Body list
An anchor point is created at the center of the Rigid body, referred to as a Rigid body marker. The Rigid body is also calculated.
Note: It is very important to create Rigid bodies on a frame where your optical markers are arranged in a T-stance or an extended pose (arms and legs fully extended, reaching towards their limits). You can recalculate Rigid bodies using the Snap button.