After you create the twist deformer, its handle is displayed in your scene and its nodes are listed in the Channel Box. The nodes include the twist handle node (default name: twistnHandle), the twist handle shape node (twistnHandleShape), and the Twist deformer node (default name: twistn).
You can edit the effects of the twist deformer by editing the twist handle node and the twist deformer node. You can move (translate), rotate, and scale the twist handle to edit the effects of the deformation. You can also edit the twist deformer node’s keyable attributes (channels), which are displayed in the Channel Box.
To edit twist deformable objects by using handle manipulators
The manipulators on the twist deformer handle let you edit attributes.
To edit twist deformers by moving, rotating, or scaling handle
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).
To edit twist deformers with the Attribute Editor
See twist.
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.