HDR (High Dynamic Range) lets a monitor show brighter highlights and deeper shadows at the same time — when it works. On PC it’s finicky: HDR that’s dim, washed out, or gray almost always means one of two switches is off, or the monitor’s HDR is weaker than the marketing suggested. In this guide you’ll learn the two toggles that must both be on, how to calibrate once, why HDR often looks worse than SDR, and when the honest answer is to leave HDR off. What You Need Before You Start: Set Expectations HDR on PC is not plug-and-play the…