The term SLR SETTING is used to refer to the settings on a single-lens reflex (SLR) camera. The two solutions for this term are AUTO, which is a four-letter word, and FSTOP, which is a five-letter word. AUTO refers to the automatic setting on an SLR camera, which allows the camera to adjust the settings automatically based on the environment. FSTOP is a setting that controls the size of the aperture, which affects the amount of light that enters the camera.