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Workflow
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Relative Shape Keys
===================
#. In *Object Mode*, add a new shape key via the *Shape Key* panel with the ``+`` button.
#. "Basis" is the rest shape. "Key 1", "Key 2", etc. will be the new shapes.
#. Switch to *Edit Mode*, select "Key 1" in the *Shape Key* panel.
#. Deform mesh as you want (do not remove or add vertices).
#. Select "Key 2", the mesh will be changed to the rest shape.
#. Transform "Key 2" and keep going for other shape keys.
#. Switch back to *Object Mode*.
#. Set the *Value* for "Key 1", "Key 2", etc. to see the transformation between the shape keys.
In the figure below, from left to right shows: "Basis", "Key 1", "Key 2"
and mix ("Key 1" ``1.0`` and "Key 2" ``0.8``) shape keys in Object Mode.
.. figure:: /images/animation_shape-keys_workflow_relative.png
Relative shape keys example.
For more practical examples, see
:ref:`how to combine shape keys and drivers <shapekey-driver-example>`.
Absolute Shape Keys
===================
#. Add sequence of shape keys as described above for relative shape keys.
#. Uncheck the *Relative* checkbox.
#. Click the *Reset Timing* button.
#. Switch to *Object Mode*.
#. Drag *Evaluation Time* to see how the shapes succeed one to the next.
.. figure:: /images/animation_shape-keys_workflow_absolute.png
Absolute shape keys workflow.
By adding a :doc:`driver </animation/drivers/index>` or
setting :doc:`keyframes </animation/keyframes/introduction>`
to *Evaluation Time* you can create an animation.
.. seealso:: Shape Key Operators
There are two modeling tools used to control shape keys and
are found in :ref:`Edit Mode <modeling-meshes-editing-vertices-shape-keys>`.
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