SUMMARY My display setup is two 3840x2160 monitors side by side, ie a left monitor and a right one. STEPS TO REPRODUCE 1. Open kcolorchooser and select "Pick Screen Color" 2. Move mouse to upper left of left screen and note offsets - 0,0 (correct) 3. Move mouse to lower right of left screen and note offsets - 1919,1080 (wrong) 4. Move mouse to lower left of right screen and note offsets - 3840,1080 (wrong) OBSERVED RESULT Both monitor sizes used appear to be 1920x1080 (wrong) with a starting offset for the right screen of 3841,0 (correct) EXPECTED RESULT 1. - 2. - 3. 3839,2159 (or perhaps 3840,2160) 4. 3840,2160 (or perhaps 3841,2159) SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.2.12-1-default/ (available in About System) KDE Plasma Version: 5.27.4 KDE Frameworks Version: 5.105.0 Qt Version: 5.15.9 ADDITIONAL INFORMATION