Curve View is the area of the Animation Workbench that displays function curves for the parts of the biped. Curve View is quite similar to the Key Window in the Track View – Curve Editor. The same navigation and key manipulation toolbars are used in both Curve View and the Key Window. Both Curve View and the Key Window let you add or delete, move or scale keys selected on the curves.
Curve View differs from the Key Window in that it also displays errors found by the Analyzer panel, functionality which is not available in the standard Track View. Curve View doesn't use soft-selection like the Key Window, instead it has a specialized Show Layered Edit command for the equivalent of soft selection on biped keys.