1. A method for use in conjunction with a computer system for displaying an indication of a preference of a condition in a selection query, the method comprising the steps of: for each of a plurality of conditions of the selection query, receiving, from a user, a numerical indication of the preference for said each condition; and for each of the plurality of conditions, displaying a particular corresponding icon for the condition so as to define a plurality of displayed icons, the particular icon being displayed with a size, relative to sizes of other ones of the displayed icons, that corresponds to the numerical indication of the preference specified by the user for the condition; whereby the displayed icons, by relative size differences thereamong, provide a visual cue of the relative preferences accorded by the user to the conditions in the selection query.