2.1.1621 Part 4 Section 18.104.22.168, xMode (Left Mode)
For additional notes that apply to this portion of the standard, please see the notes for wMode, §22.214.171.124(a) .
a. The standard states that factor is a valid value of the val attribute for xMode.
Office only saves a val of edge, changing files with factor on save and updating x to reflect this change and preserve the position. This may result in the manualLayout being ignored on subsequent loads if val of x is >1 or <0 after conversion.