The Color Filters feature is among the most unique and powerful tools in EXPRESS. Change silver to gold; an emerald to a ruby in one step. Select an entire image or a single color and apply the filter specified. Sixteen filters allow you to lighten, darken, and change the contrast all in one step. See a partial list of the Artistic Filters available below.     Use the technical filters to change the colors using various models to specify     the exact color. Convert entire documents to grayscale for best results on     black and white printers. Eliminate dithered colors for on-screen presentations     and more.