How to Convert Image to Indexed Color Mode

* The Indexed option helps to convert the available image into an indexed colored image.
* This tool transforms an image into an indexed color featured picture.
Steps to Follow
- Open GIMP.
- Launch an image file.
- Then click Image -> Mode -> Indexed.

- A box named Indexed Color Conversion displays.

- Set the "Colormap and Dithering" options as per your need. For e.g. pick the Use black and white (1 bit)palette and click "Convert" button.

- Finally save the file by clicking the Save button.