13. An apparatus for facilitating skimming of a document by a user, the document having a plurality of terms, the apparatus comprising: a processing system that determines a term-score for each of the plurality of terms and that maps the term-score of each of the plurality of terms onto one of at least three values of at least one variable emphasis attribute usable to present the document; and a presentation system that presents each of the plurality of terms of the document using the corresponding mapped values of the at least one variable emphasis attribute.
13. An apparatus for facilitating skimming of a document by a user, the document having a plurality of terms, the apparatus comprising: a processing system that determines a term-score for each of the plurality of terms and that maps the term-score of each of the plurality of terms onto one of at least three values of at least one variable emphasis attribute usable to present the document; and a presentation system that presents each of the plurality of terms of the document using the corresponding mapped values of the at least one variable emphasis attribute. 23. The apparatus of claim 13, further comprising a mode switch.