Nikon D5300 Reference Manual - Page 104

Mode P (Programmed Auto) This mode is recommended for snapshots or whenever you want to leave the camera in charge of shutter speed and aperture. The camera automatically adjusts shutter speed and aperture for optimal exposure in most situations. Mode dial To take pictures in programmed auto mode, rotate the mode dial to P. A Flexible Program In mode P, different combinations of shutter speed and aperture can be selected by rotating the command dial ("flexible program"). Rotate the dial right for large apertures (low fnumbers) and fast shutter speeds, left for small apertures (high f-numbers) and slow shutter speeds. All combinations produce the same exposure. Rotate right to blur background details or freeze motion. Rotate left to increase depth of field or blur motion. Command dial While flexible program is in effect, a U (R) indicator appears in the viewfinder and information display. To restore default shutter speed and aperture settings, rotate the command dial until the indicator is no longer displayed, choose another mode, or turn the camera off. 84 P, S, A, and M Modes