I.R.I.S. Cardiris 4 - Manual (Page 87)

Cardiris TM 4 – User Guide
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Color Depth
Select the appropriate color depth - IRISCard Button Manager
supports black-and-white, grayscale and color images.
Resolution
The resolution can be set to 300, 400 and 600 dpi. It is
recommended to use a resolution of 400 dpi.
Operation Mode
Select the operation mode you want to use.
You can either scan:
 automatically when the scanner senses a card, or;
 manually by means of the scanner buttons.
To each of the two scanner buttons, one of four actions can be
assigned, namely:
 scan the card and save the image to the IRISCard folder;
The image will be saved as a JPEG file.
 scan the card and save the image to a file;