When you import a file containing optical data, an optical root is created. The Optical settings enable you to edit and correct optical data associated with an optical root. When processing optical data, the Optical settings set up Rigid bodies that solve occlusions in real-time.
You use the Optical settings to edit active optical data. Active optical data refers to optical markers that are not set to Done in the Optical options Label pane. When set to Done, optical markers are no longer active in the Optical settings. However, they are active in the FCurves window for editing and filtering.