2.1.1832 Part 4 Section 19.2.2.18, lock (Shape Protections)
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For additional notes that apply to this portion of the standard, please see the notes for pict, §14.2.2.2(a); pict, §14.5.1(a); hdrShapeDefaults, §14.7.2.1(a); shapeDefaults, §14.7.2.2(a); background, §17.2.1(a).
a. The standard indicates that the aspectratio attribute specifies whether the aspect ratio of a shape is locked from being edited in an application's UI.
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Office does not enforce the aspectratio attribute lock in all UI.
b. The standard implies that the cropping attribute specifies whether a shape may be cropped in the application's UI.
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Office only allows cropping for pictures.
c. The standard does not restrict the number of instances of this element.
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Office allows at most only one instance of the lock element in each place where it can be used.