2.1.1196 Part 4 Section 4.6.43, from (From)

For additional notes that apply to this portion of the standard, please see the notes for rCtr, §4.6.62(a).

a.   The standard states that the x attribute describes the X coordinate.

PowerPoint uses the x attribute to specify the slide width percentage change when the from element is parented by the animMotion element, and the animated object width percentage change when the from element is parented by the animScale element.

b.   The standard states that the y attribute describes the Y coordinate.

PowerPoint uses the y attribute to specify the slide height percentage change when the from element is parented by the animMotion element, and the animated object height percentage change when the from element is parented by the animScale element.

c.   The standard states that the from element specifies an x/y co-ordinate to start the animation from.

When this element is contained within animMotion (“[ECMA-376] Part 4 §4.6.4; animMotion (Animate Motion)”), the attributes x and y are interpreted as slide percentage and shall be greater than or equal to -2147483625 and less than or equal to 2147483625. When this element is contained within animScale (“[ECMA-376] Part 4 §4.6.6; animScale (Animate Scale)”), the attributes x and y are interpreted as size percentage and shall be greater than or equal to 0 and less than or equal to 2147483625.

If the value of either the x or y attribute is greater than 16384000 or less than -16384000 there will be loss of precision due to internal calculations.

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