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• Move XY: Drag here to move the object along the X and Y axes. Dragging right or left
increases or decreases the X value. Dragging up or down increases or decreases the Y
value. Using this control is identical to draggin a 2D object in the Canvas. Hold down
the Command key when dragging to constrain movement to the initial direction of
the drag.
• Move XZ: Drag here to move the object along the X and Z axes. Dragging right or left
increases or decreases the value of X. Dragging up or down increases or decreases the
value of Z. Hold down the Command key when dragging to constrain movement to
the initial direction of the drag.
Tip: As in the Inspector, holding down the Shift key while you drag in the HUD makes
larger changes. Holding down the Option key while you drag makes smaller changes.
Rotate and Scale: Two additional drag controls in the HUD let you rotate and scale the
selected object in the Canvas:
• Rotate XYZ: Drag here to rotate the object around all axes. Starting at the origin,
dragging up and down rotates the object around the X axis. Dragging to the left and
right rotates the object around the Y axis.
To constrain rotation to the Z axis, hold down the Command key while dragging.
• Scale: Drag here to uniformly scale the selected object in the Canvas. Dragging to the
right or up (or both) increases the Scale value. Dragging to the left or down (or both)
decreases the Scale value.
To constrain scaling to the axis corresponding to the initial direction of the drag, hold
down the Command key while dragging.
Adjust Around: The Adjust Around pop-up menu, located under the Move, Rotate, and
Scale controls in the HUD, allows you to select which relative coordinate space is used
for transforms. The Adjust Around pop-up menu has three options:
• Local Axis: The default, this option orients the onscreen transform controls to the
object’s local axes.
• World Axis: This option orients the onscreen transform controls to the axes of the 3D
grid in the Canvas.
• View Axis: This option orients the onscreen transform controls to the view space of the
current view. The Z axis is aligned along the view’s line of sight. For more information
on views, see Views.
1236 Chapter 21 3D Compositing