linux open window on desktop without display manager I want to record some video tutorials with record desktop and webcam . and open webcam with mpv player with this command : mpv av://v4l2:/dev/video2 I want to understand how can open webcam without window manager frame in KDE desktop environment ? ![enter image description here](

For an one-time application, you can right-click the window title bar, and select "More Actions > No Border".

If you want a particular program's window to always be borderless, you could go to System Settings -> Window Management -> Window Rules, and define a rule that will automatically make that window borderless anytime the window is created.