We are in the process of updating this documentation for OpenSim 4.0. Are you looking for OpenSim 3.3 documentation?

In this section, we provide a conceptual review of the inputs and outputs of the Scale tool and a set of troubleshooting tips and best practices for scaling. Carefully scaling your model to match your subject is essential for getting good results from later tools, like Inverse Kinematics and Inverse Dynamics.

Next: Getting Started with Scaling