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I am trying to find a workaround for incorrect grouping of windows in Docky, and I believe the problem lies with the WMClass attribute that is set for each window. However, I do not know how to view this attribute for open windows. Is there any way to do this?

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up vote 13 down vote accepted
 %> xprop WM_CLASS

and then click the window in question

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can you add a clue where to write this ? – iRaS Nov 2 '15 at 13:56

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