Adjust image while changing to indexed color mode

Would love to be able to adjust HSV, brightness and contrast (with preview) while converting to indexed mode.

Sometimes mapping a RGB image to a palette is not optimal. It would be great to be able to adjust the image (HSV, brightness, contrast) with a real-time preview while converting to indexed color mode.

My suggestion is basically to add the current HSV panel and brightness/contrast panel (including ability to pick channels) to the “Color Mode > More Options : Advanced Options” panel - like this mockup, just way better :smile:

In the meantime, I have created a script to help with this.
See this thread.