[Script] Grayscale Preview

Small script that facilitates the preview of grayscale to check values of my artwork.
Cause Grayscale on the Color Mode ruins the palette and I was annoyed.
It works by creating an color layer at the top that displays your artwork in grayscale.

I put it on my F6 shorcut, so I toggle it on/off anytime.

Hope it’s useful for you too. o/