You can remove the window decorations and use your own styling, the way Spotify does. But your users won't be happy with the theming opstions.
– Dilyan TrayanovJun 04 '19 at 10:40
Have you looked into https://doc.qt.io/archives/qt-4.8/qstyleoptiontitlebar.html ? Maybe this would help to achieve the goal you want to achieve?
– Vaidotas StrazdasJun 04 '19 at 13:26
You can use a empty or 1x1 pixel icon if you dont need it in system displaying.
– Tom KimJun 04 '19 at 19:53