An apparatus includes a display device that displays an input document in a user interface and at least one processor configured to receive a command to determine a document type of the input document and classify the input document to assign at least one document type and a respective confidence score. The processor assigns a significance score to each word of the input document that is indicative of a degree of influence the word has in deciding that the input document is of the at least one document type. The processor determines a level of visual emphasis to be placed on each word of the input document based on the significance score of the word and displays the input document on the display device with each word of the input document visually emphasized in accordance with the determined level of visual emphasis of the word.