Main toolbar > Open Track View > Track View toolbar > Edit Time > Reduce Keys
Graph Editors menu > Track View > Open Track View > Track View toolbar > Edit Time > Reduce Keys
Use Reduce Keys to reduce key density. Using inverse kinematics, or creating any complex animation, can leave you with many keys. In the case of applied inverse kinematics, the software generates a key on nearly every frame. Often, the same animation can be produced with fewer keys. Having fewer keys in a track makes it easier to change your animation.
Use Reduce Keys in Edit Time mode to analyze the pattern of keys in a block of time and create a new pattern of fewer keys that produces nearly the same animation. You specify how closely the new animation matches the original.
Procedure
To reduce keys within a block of time:
On the Track View toolbar, click Edit Time.
In the Track View Hierarchy list, select item labels to select tracks for time editing.
Select a block of time.
On the Track View toolbar, click Reduce Keys.
The Reduce Keys dialog is displayed.
Enter a value in the Threshold field to specify how closely to match the original animation.
If you apply key reduction to multiple tracks, the threshold value is applied to each track using the track's value type. For example, if you select both a position track and a bend angle track and apply key reduction with a threshold value of 0.5, positions will be held within 0.5 units of the original, and bend angles will be held within 0.5 degrees of the original.
Interface
Reduce Keys: Display the Reduce Keys dialog.
Threshold: Sets a threshold value.