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I used to do that with KDEWM, but it doesn't seem to work now. I did my research, but couldn't find anything.
In system settings -> Default applications -> Window manager there is an option to use another window manager, however it doesn't let me mark it. Of course, I have xfwm4 installed.
Hope someone can help me
PS: Trully sorry if this message doesn't belong here
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I did it using compiz fusion icon. It may not be the most elegant solution, but it works.
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