1. A method for facilitating skimming by a user of a document presented on a presentation device using at least one variable emphasis attribute having at least three values, the document having a plurality of terms, the method comprising: determining a term-score for each of the plurality of terms; mapping the term-score for each of the plurality of terms onto one of the at least three values of the at least one variable emphasis attribute; and presenting to the user each of the plurality of terms of the document using the mapped values of the at least one variable emphasis attribute.
8. The method of claim 1, further comprising converting the plurality of terms into canonical form prior to determining the term-score.