To edit twist deformable objects by using handle manipulators

The manipulators on the twist deformer handle let you edit attributes.
-drag
the mouse to edit interactively. Note that the Channel Box updates
the values you are changing.
To edit twist deformers by moving, rotating, or scaling handle
(Linux and
Windows) or
(Mac
OS X) key, moving the pivot point, and then pressing the
or
key
again.
Remember that you can access the deformer handle’s local axes (Display > Transform Display > Local Rotation Axes), rotate and scale pivots (Display > Transform Display > Rotate Pivots or Scale Pivots) and selection handle (Display > Transform Display > Selection Handle).
To edit twist deformers with the Channel Box
One quick way to select the twist deformer node is to select the object being deformed, and then select the twist deformer node in its history from the Channel Box (under INPUTS).
Note that you can control which attributes are listed as keyable attributes (channels) in the Channel Box with the Channel Control editor (select Window > General Editors > Channel Control).
-click
and move the mouse to the left or right. By moving the mouse, you
interactively change the value of the selected channel. As you move
the mouse, note that pressing the
key gives
you finer control, and pressing the
key
gives you less control.
To edit twist deformers with the Attribute Editor
+a.
See twist.
(Linux
and Windows) or
(Mac
OS X) key.
The twist deformer handle, twist deformer handle shape, and twist deformer nodes are all deleted. However, the object still has the tweak node as an input node, so any tweaks you might have made are preserved. Also, note that the various input nodes that structure the evaluation of the deformation are not deleted.