To find the Highlights slider, click the image thumbnail in the Fill section of the Design panel. Adjusting highlights in Figma enhances the lighter areas of your image, making it easy to distinguish between bright spots and shadows. It allows for increasing the difference between light and dark areas for more depth. This adjustment can also help soften glaring highlights or boost them for a luminous effect.

This feature is especially handy when you want to balance your image's overall look or highlight specific details, ensuring your design stands out.