no menu under KDE
I'm running cheese 3.31.90 under KDE Plasma 5.14.5 and Debian 10.1.
There is no menu bar, and therefore no way to change options.
I googled the problem, and apparently it has to do with Gnome functionality that puts the menu bar on top of the desktop, instead of inside the window. Such a desktop menu bar is not supported under KDE afaik. The correct behavior would be to show the menu bar inside of the window if the desktop menu bar is not supported by the desktop environment.