A reading device connected to an external device include a transport section configured to transport a document, a reading section configured to read the document transported by the transport section, a data generation section configured to generate image data of the document read by the reading section; a transfer section configured to transfer the image data to the external device, a notification section configured to notify information to a user, and a control section, wherein the control section is configured to control a transport speed of the document by the transport section based on a transfer speed of the image data by the transfer section and, when the transport speed is changed, to cause the notification section to notify using a change notification A1 indicating a change in the transport speed.

The disclosure discloses methods and systems for scanning multiple pages. The methods and systems can be implemented at a device such as a scanner, multi-function device, a mobile device, or an app running on the mobile device. The method receives the front side of the multiple pages to be scanned. In a first scan session, the front sides of the multiple pages scanned. Then, the back sides of the multiple pages are placed for scanning. In a second scan session, the back sides of the multiple pages are scanned. Based on an overlap and non-overlap area of the multiple pages scanned in the first scan session and the second scan session, the back side of a scanned page with the corresponding front side of that scanned page is associated. Based on the association, the scanned pages are arranged such that all scanned pages are in correct order in a scanned output such as PDF.