Sometimes there’s a need to replace some colour with transparency. This option makes it possible. Please notice that transparency works only with PNG files, because JPEG format doesn’t include any information about transparent pixels.
To use this option you have to check Replace colour with transparency box.
Next you should define the colour for replacing and set the tolerance (colours Tolerance [in percents]. (Colours with a difference between original colour value on each channel and tolerance value will be replaced).
