I.R.I.S. IRIScompressor Standard - Manual (Page 14)

Using IRISCompressor
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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.