I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 125)

Section 9: Saving Documents
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
Select the desired XPS type from the drop-down list:

XPS Image-Text. This file type is most commonly used. It
contains two layers: the recognized text, and the original image
on top of the text. This way, you have both access to the
recognized text and you still see the original image.
Note: since the image covers the text, any recognition mistakes will
not be visible.

XPS Text-Image. This file type is the opposite of XPS Image-
Text. It contains the original image in the background, and the
recognized text on top of the image.
Note: any recognition mistakes will be visible in this format.