New Tangent Angle and Weight options have been added to the Graph Editor toolbar.
Two new options, Angle and Weight , have been added to the Graph Editor toolbar to give easy access and better control over tangent weighting, letting you change angles and weighting on multiple keys at the same time, either manually or by entering a precise value, all while remaining in contact with your curve.
These controls provide Maya with new controls inside the Graph Editor, where previously, you could only modify multiple In/Out Tangents and Weights in the Attribute Editor.
A new command was also added for these options: keyframeTangentControl