1. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a processor, cause an output apparatus, which includes a storage section configured to store a plurality of document data sets having a predetermined order and acquired from a plurality of documents and an output section configured to output images of a plurality of document data constituting the plurality of document data sets, to perform: a first output control process of controlling the output section to output an image of a document data belonging to one document data set among the plurality of document data sets and, thereafter, output an image of a document data belonging to the next document data set according to the predetermined order of the plurality of document data sets; and a second output control process of controlling the output section to output an image of a document data belonging to a specified attribute of one document data set among the plurality of document data sets and, thereafter, output the next image based on the attribute, each of the plurality of document data sets having a plurality of attributes including the specified attribute, wherein the storage section is configured to store each of the plurality of document data sets in a state that each of the plurality of document data sets is sectioned by the plurality of attributes.