I.R.I.S. IRIScompressor Pro Mac - Manual (Page 15)

Using IRISCompressor Pro
16
Attention: IRISCompressor can compress maximum 25 pages at
a time. So, make sure the total number of pages contained in your
different files does not exceed 25. For your information: 1 image
corresponds to 1 page. If you try to compress documents that
contain more than 25 pages, only the first 25 will be processed.
Step 2: Rearranging the files
The order in which the files are displayed in the interface is the
order in which they are converted into PDF or XPS files. This is
important when compressing a series of files into 1 single output
file.
To change the order of files, select one file and:

Click the Move up or Move down arrows.
OR

Press Page Up or Page Down on your keyboard.
To delete files from the interface, simply select them and click the
Delete icon or press Delete on your keyboard.
Step 3: Selecting the OCR settings
The OCR option is selected by default. This feature creates fully
text-searchable output files. In case you only want to compress your
files, clear this option.