When OCR tab is selected the following options are available:
Figure 1. Preferences Dialog Box, OCR Tab Selected
Note that two optical character recognition engines are available in PDF-Exchange Editor: the Default OCR engine and the Enhanced OCR engine, which is available when PDF-Exchange Editor Plus is purchased (either as a stand-alone product or as part of the PDF-XChange PRO bundle). The Enhanced OCR engine is faster, more accurate and more dynamic than the default OCR engine, and it also contains some extra features. Further information about the Enhanced OCR engine is available here.
•Use the dropdown menu to select either the Enhanced or Default OCR engine.
•Click Add/Update languages to view/download languages to use in conjunction with the OCR features of PDF-XChange Editor.
Click Apply to apply changes and OK to save changes.