The right colours. Like many other functions, Buttonization can only be applied to images displayed in millions of colours. If this is not the
case for your image, select Colours > Increase Colour Depth > 16 Million Colours.Once you have applied the effect to your image, you can then set the image to the number of colours needed for the Web (256 colours at the most for a GIF file) or save it in the format of your choice (GIF or JPG).
