The answer to the crossword question “Hi-___ photo” is RES. This term is commonly used in photography to refer to the resolution of an image. It is a measure of the number of pixels in an image, which determines the level of detail and clarity in the picture. A higher resolution means more pixels and a sharper image, while a lower resolution results in a more pixelated and blurry photo. Therefore, when taking photos, it is important to consider the resolution to ensure that the final image is of high quality.