[farshizzo]

To scale the robot, but not the movement, you can apply the scale to the head/body parts: For example, to double the size try the following code:

robot.head.setScale([2,2,2])
robot.body_root.setScale([2,2,2])

You can apply an offset to the tracker, to center with the eye height:

robot.setTracker(viz.link(tracker,viz.NullLinkable,offset=[0,-0.2,0]))