2.1.1256 Part 4 Section 5.1.2.1.34, spLocks (Shape Locks)
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For additional notes that apply to this portion of the standard, please see the notes for picLocks, §5.1.2.1.31(a).
a. The standard uses a shared attribute group for the locking attributes of shapes, pictures and other graphic objects.
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Office ignores attributes noChangeArrowheads and noRot when applied to a shape. PowerPoint additionally ignores the attribute noAdjustHandles when applied to a shape and noChangeShapeType when the converting the shape to a freeform.