r. 40 Brightness/Contrast. 28, 38 custom, 39 edge, 40 effects. 39 Emboss, 40 Equalization, 38 Gamma, 38 Gaussian Blur. 100 Grayscale. 39.41 Hue/Saturation/Lightness. 38.40 Negative Image. 39 Posterize. 40 Replace Color. 38 Stretch. 38 Threshold. 38 flattening an image. 31.64 Flip command. 36 Flood Fill to