3.From the list of
Depending on how many other Twain compliant devices you may have only one, or more.
You must select PenTwain source when you are using the DocuPen™ scanner .If you have used another device prior, then that device will remain default till you reselect PenTwain device. This is only the case if you have multiple scanners.
If you only have DocuPen™ as a scanner then it will remain default, until another device is added.
DocuPen™ Operation Manual 21
