The XYZ controllers assign an individual track to the X, Y, and Z components of the position, rotation, or scale of an object. However, the controllers always assign three keys (one for each axis), by default.
You can create keys on specific axes with actions available from the Customize User Interface dialog, with the following caveats:
You can also use Keyable Icons to turn on or off tracks for editing. This allows you to set keys on only specified PRS X, Y or Z axes as well. See Show Keyable Icons.
Creates an explicit key on the designated position axis.
Creates an explicit key on the designated rotation axis.
Creates an explicit key on the designated scale axis.