A controlling device may cause a scan performing unit to perform either a first type of scan or a second type of scan. In the first type of scan, a document may be moved with respect to optical elements while the optical elements are not moved, and in a second type of scan, the optical elements are moved with respect to the document while the document is not moved. The controlling device may judge that a first type of analysis is to be performed on scan data in a case where one type of scan is performed, and judge that the first type of analysis is not to be performed in a case where the other type of scan is performed. The controlling device may determine an output resolution by utilizing a result of the first type of analysis, and create a file including image data indicating the output resolution.