One of my users selects data in a bar graph (by brushing, I think the expression is) in order to bring some focus on to a line graph that plots a set of time series. Of course, the select values retain their colours and the deselected ones are greyed. I'd like to be able to configure the deselect colour of these lines (and would probably choose white, to make them invisible). As it stands, with more than a small number of lines drawn, the greyed out lines become confused with lighter-shaded selected lines. I know that the desired effect can be achieved by using the right-hand filter boxes, but the user I'm designing reports for finds brushing (if that's the correct term) preferable.