If you have, say, 4 xterms open and would like to toggle between them, this is for you (emulated from OSX 
):
Key Less A M ThisWindow Next ("$[w.class]") WarpToWindowIf you have, say, 4 xterms open and would like to toggle between them, this is for you (emulated from OSX ):
Key Less A M ThisWindow Next ("$[w.class]") WarpToWindow