The Select by Color tool has several options that can help you fine-tune your selection. Sometimes you’ll need to adjust these to precisely capture all of the areas you want. Anti-aliasing This setting helps to reduce jagged edges when selecting areas. Feather Edges You can use this to further refine your edges. Threshold The threshold setting helps to determine how much you want to deviate from a color selection. The higher the threshold, the wider the range of color will be that the tool will select. Select by Use this setting to target a specific hue channel, such as RGB, Alpha, HSV hue, or HSV saturation. Draw Mask The Draw Mask option is of great value if you’re having difficulty seeing the selected area. This option will add a magenta overlay to the selected areas of the image.