Use the setting Automatic to have Readiris detect the printing quality for you. This mode supports all printing qualities - typeset, typewritten, laser printed, inkjet printed, letter quality dot matrix printing and draft dot matrix printing.
Use the setting Dot Matrix strictly for draft dot matrix printing: such texts require highly specialized segmentation and recognition techniques.
This command does not apply to Asian documents!
Tip: the tooltip of the Recognize button indicates the reading mode. When no message is added, the “automatic” font type detection applies, when the message “Dot matrix” is added, the dot matrix reading mode is enabled.