I.R.I.S. Readiris 14 for Mac User Guide - Manual (Page 43)

Section 4: Scanning and Opening Documents
38
- Readiris can be set as target application of your scanner, if your scanner
supports that feature. That way you scan documents on your scanner and
transfer them to Readiris, just by clicking your scanner buttons. See your
scanner documentation for more information.
S
CANNING WITH
I.R.I.S.
SCANNERS
IRIScan Express 2
When using an IRIScan 2 scanner there are specific settings you can
apply.
 On the Readiris menu, click Preferences.
 Click the Scanner tab.
Format
You can either choose an automatic scanning format or a custom
format for which you can indicate the page height and width.
Depth
Readiris supports black-and-white, grayscale and color images.