1. A method of searching an information space, comprising the steps, performed by a data processing system, of: displaying an initial window, wherein one navigator of a plurality of navigators, designated as a first current navigator, is displayed in a current navigator area; displaying, in the initial window, respective navigator areas representing others of the plurality of navigators; inputting an indication that the user wishes to use a particular one of the other navigators as a new current navigator; and displaying, in the current navigator area of the initial window, the particular navigator indicated by the user in the current navigator window, in place of the current navigator.