2.1.77 Part 1 Section 188.8.131.52, fitText (Manual Run Width)
a. The standard states that the fitText element causes the contents of the run to be resized to fit the width specified by the val attribute.
Word ignores this element inside Math, inside structured document tags, and for text that does not match the reading order of the parent paragraph.
b. The standard states that if the id attribute is omitted, then this run has no ID and shall not be linked with any other run in the parent paragraph.
Word assigns an id of 0 when the id attribute is omitted, and links it to other contiguous runs having an omitted id attribute (or an explicit id value of 0).
c. The standard states that the val attribute can contain any 64-bit integer value.
Word restricts this attribute to a value between 0 and 31680 (22").
d. The standard does not state how a conflict between this setting and the spacing element and/or the eastAsianLayout element should be handled.
Word uses this element when it is present, ignoring the spacing element and/or the eastAsianLayout element.