Picture settings are most useful when adjusted in the room where you watch. A bright daytime space may require different screen brightness from a dark evening room, and reflections can make contrast seem lower than it is. Position lamps to reduce glare before compensating with extreme picture settings. Choose a viewing mode designed for accurate or natural images as a reasonable starting point.
Adjust brightness and contrast carefully, using familiar scenes with both dark and bright detail. If shadows lose all detail or bright areas look harsh, restore the default setting and make smaller changes. Color temperature can affect whether the picture looks warm or cool; a warmer option may appear more natural after your eyes adapt. Motion smoothing is a matter of preference and can be reduced if films look unnaturally fluid.
Picture modes may be stored separately for each input or content type, so check the settings while using the device you care about. Disable energy-saving features only if you understand their effect and prefer the result. Avoid copying settings from another television, since panels and rooms differ. Give adjustments a little time, then compare with familiar content at comfortable brightness rather than judging from a brief, vivid demonstration clip.