About random sampling
Using random sampling, you can generate a sample document set from a specific document population in the Document List. You can use that sample to gain insight into the document population. Once run, the sample appears in the Document List until you clear it. If you want to keep the sample set, tag the documents specifically or move the document sample to a folder. Due to the nature of it being a random sample, you cannot change it using search or the View or Sort by options.