When you animate a clip’s Weight, a weight curve is created for the clip.
button.
The Graph Editor appears with all the selected clip’s animation curves framed in its graph view.
-click the clip and select Graph Weight from the menu that appears.
The Graph Editor appears with the selected clip’s weight curve framed in its graph view.
Select the Move Tool from the Maya toolbox, and
-drag the keys or their tangents to change the shape of the curve.
Select the Insert Keys Tool or Add Keys Tool from the Graph Editor’s toolbar, and
-click the weight curve to insert additional keys that you can use to change the shape of the curve.
To create a weight curve for a clip without manually keying the Weight attribute
-click the clip and select Create Weight Curve from the menu that appears.