Solution
When scanning using the [OCR], [PDF], [Scan-1], or [Scan-2] buttons, you can specify an application to be used to display the scanned image. Click [Set] → select the application to use → click [Open]. You can also specify an application by dragging and dropping the application icon onto the dialog box.
When scanning using the [Mail] button, you can specify an e-mail software to which you want to attach the
scanned image. The MF Toolbox is compatible with e-mail software such as Outlook Express, Microsoft Outlook,
Microsoft Exchange, EUDORA, Netscape Messenger and Windows Mail (Vista only). Click [Set] → select the application to use → click [OK].
If [None (Attach Manually)] is displayed, you have to attach the image file manually.