I.R.I.S. IRIScompressor Pro Mac - Manual (Page 20)

IRISCompressor TM Pro – User Guide
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Note: the languages that are available here are the ones you
selected during installation. In case only 1 language is available
or you need different languages, uninstall IRISCompressor,
reinstall it and select other OCR languages. You can install a
maximum of 5 languages.
Note: make sure the OCR language you select corresponds to the
language of your files. Selecting a wrong OCR language will lead
to unsatisfactory OCR results.
Favorite Output Folder
The Favorite Output Folder is the folder where IRISCompressor
generates the compressed output files. By default, this folder is
C:\Users\"YourUser"\Documents. Click the browse button to
change it.
Advanced options

Select Auto Deskew in case you are processing images that are
not entirely straight - or "skewed". The Auto Deskew option
straightens your images.
Note: the skew angle may not exceed 10 degrees.

Select Auto Orientation in case you are processing a
combination of images with vertical text and images with
horizontal text. The Auto Orientation option rotates all images
to the same direction.
Note: the images must contain text in order for IRISCompressor
to do the orientation.