Text in the document is not marked
No background color means that the document has been either vectorized or scanned and the textual information behind the characters has been lost.
Figure 1: orange marked text in the original, no marked text in the copy file
If the two documents share an identical layout like in Figure 1, the Artwork module can be used to find differences between the files.
Please check the following article on how to compare flat images with the Artwork Module:
Compare Full Page Image Pairs (Artwork Module)
If there are any more questions, please refer to the User Manual or send your inquiry to:
support@sh-p.com