user: Explain Options in complete detail according to the official Blender documentation.

assistant: [image reference removed]

Copy Transforms constraint.

[Target](../interface/common.html#rigging-constraints-interface-common-target)
:   The object or bone whose transforms to copy.

Remove Target Shear
:   Removes shearing from the Target’s transformation before Mixing,
    ensuring it consists purely of translation, rotation, and scale.

    [image reference removed]

    If a child bone is rotated and its parent is non-uniformly scaled, it will get sheared,
    and so will any object that copies its transformation (middle cube). Use *Remove Target Shear*
    to fix this (right cube).

Mix
:   Specifies how the target’s current transformation (from all its constraints) is combined with the
    owner’s original transformation (from its preceding constraints).

    Replace:
    :   The target’s transformation replaces the owner’s.

    Before Original (Full):
    :   The target’s transformation is applied before the owner’s. The result is the same as
        the owner’s transformation if it were a child of the target and there was no constraint.

        If the “parent” is non-uniformly scaled and the “child” was originally rotated,
        the constraint will cause shearing, just like the default
        [Inherit Scale Full](../../armatures/bones/properties/relations.html#bpy-types-editbone-inherit-scale) setting for bones.

    Before Original (Aligned):
    :   Prevents shearing by scaling the “child” along its own axes instead of the axes of
        the “parent,” just like the [Inherit Scale Aligned](../../armatures/bones/properties/relations.html#bpy-types-editbone-inherit-scale)
        setting for bones.

    Before Original (Split Channels):
    :   Calculates each transform “channel” – location, rotation, and scale – separately
        from the others. This is the same as having a
        [Copy Location](copy_location.html) constraint,
        a [Copy Rotation](copy_rotation.html) constraint,
        and a [Copy Scale](copy_scale.html) constraint
        (all using *Offset*/*Before Original*). The result may be slightly different
        with sheared inputs, however.

        The difference with *Before Original (Aligned)* is that the child’s location is only
        affected by the parent’s location, not by its rotation and scale.

    After Original (Full/Aligned/Split Channels):
    :   Like *Before Original*, except the result is the transformation of the target
        if it were a child of the owner.

    |  |  |
    | --- | --- |
    | ../../../_images/animation_constraints_transform_copy-transforms_mix-none.png   No constraint. | ../../../_images/animation_constraints_transform_copy-transforms_mix-before-original-full.png   With *Before Original (Full)*, the cone is scaled along the cube’s Y axis, causing shearing. |
    | ../../../_images/animation_constraints_transform_copy-transforms_mix-before-original-aligned.png   With *Before Original (Aligned)*, the cone is scaled along its own Y axis, preventing shearing. | ../../../_images/animation_constraints_transform_copy-transforms_mix-before-original-split-channels.png   With *Before Original (Split Channels)*, the cone’s location is independent of the cube’s rotation and scale. |

[Target/Owner](../interface/common.html#rigging-constraints-interface-common-space)
:   The spaces for retrieving the transforms from the target and for applying them to the owner.

[Influence](../interface/common.html#bpy-types-constraint-influence)
:   How strongly the constraint affects the owner.