A document editing processing apparatus which enables formulation of a hybrid multimedia document containing e.g., an image readily and speedily. Each time a character is input, dictionary retrieval is performed with e.g., an undefined character as a retrieving condition, at the same time as a filename of a multimedia information file is retrieved. The results obtained on dictionary retrieval and the results obtained on file searching are demonstrated on a menu as conversion candidates. Alternatively, a multimedia dictionary is retrieved, using a multimedia dictionary in which the multimedia information has been registered in association with the reading, with the retrieved results being conversion candidates. Still alternatively, dictionary retrieval is executed, with e.g., an undefined character as a retrieving condition, using a word dictionary having the reading associated with multimedia information identifiers. This enables formulation of a hybrid multimedia document containing e.g., an image readily and speedily.