Burning-in is a darkroom technique used to darken specific areas of a photographic print by giving them extra exposure during the printing process. This allows photographers to enhance detail, control contrast, and balance tonal values, particularly in highlights. The same concept is used in digital image editing, where tools like the Burn tool in Adobe Photoshop enable photographers to selectively darken pixels. Burning-in is an essential technique for achieving refined, professional-quality images in both traditional and digital photography workflows.