Don’t worry about preserving thumbnail or timestamp data. This is all useless information that needlessly takes up disk space. Open up the Advanced column and make sure you have unchecked absolutely everything listed in the entire menu. Upon export, you’ll be prompted with the following export menu…
Now, go ahead and export your image as a PNG file. Leave those values just as they are (or set those values if GIMP didn’t default to them) and click Convert. This will bring up the Indexed Color Conversion menu.īy default, “Generate optimum palette” will be selected and the maximum number of colors should be set to 255.
