--- dwm_5.9/config.def.h    2012-01-09 13:24:27.641504416 +0400
+++ dwm_6.0/config.def.h    2012-01-09 15:16:29.673005659 +0400
@@ -24,6 +24,7 @@

 /* layout(s) */
 static const float mfact      = 0.55; /* factor of master area size [0.05..0.95] */
+static const int nmaster      = 1;    /* number of clients in master area */
 static const Bool resizehints = True; /* True means respect size hints in tiled resizals */

 static const Layout layouts[] = {
@@ -55,6 +56,8 @@
    { MODKEY,                       XK_b,      togglebar,      {0} },
    { MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
    { MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
+   { MODKEY,                       XK_i,      incnmaster,     {.i = +1 } },
+   { MODKEY,                       XK_d,      incnmaster,     {.i = -1 } },
    { MODKEY,                       XK_h,      setmfact,       {.f = -0.05} },
    { MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
    { MODKEY,                       XK_Return, zoom,           {0} },