2.1.1479 Part 1 Section 21.2.2.81, hMode (Height Mode)

For additional notes that apply to this portion of the standard, please see the notes for wMode, §21.2.2.231(a).

a.   The standard states that edge is a valid value for the val attribute of hMode.

Office only saves a value of factor for the val attribute.  Files opened with val equal to edge will be changed to factor on save and the val of sibling element h will be updated to reflect this mode change and correctly preserve the manual size.