I.R.I.S. IRIScompressor Standard - Manual (Page 12)

Using IRISCompressor
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
Then right-click them and point to IRISCompressor in the
menu that is displayed.

Click Compress here to compress the file in the same location
as the original.
Your files are converted to compressed PDF files by default.
Note: if you convert regular PDF files into compressed PDF files,
the original files are replaced by the compressed versions.
The output files IRISCompressor generates are by default text-
searchable, thanks to I.R.I.S.' OCR technology.
Important note: Adobe Reader is recommended to open
compressed PDF files on a mobile OS (e.g. on an iPad or Android
tablet)

Click Compress to favorite folder to compress the file to a
specific folder. The default folder is your Documents
(C:\Users\"YourUser"\Documents).
To change the default settings:

Right-click a file.

Point to IRISCompressor, and click Options.