diff --git a/README.md b/README.md
index 5e3a1e8..21da4f6 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Super +         q                 ->      Close current window
 Super + Shift + r                 ->      (dmenu) dmenu_run
 Super +         s                 ->      (dmenu) startpagesearch
 Super + Shift + t                 ->      Enable tiling layout
-Super +         z                 ->      (Tiling) Decrease master window size
+Super + Shift + z                 ->      (Tiling) Decrease master window size
 Super +         F5                ->      enable 2 Screen Monitor
 Super +         F6                ->      toggle touchpad
 Super +         F7                ->      (dmenu) mounting drives
diff --git a/config.def.h b/config.def.h
index c89dbf3..e50c3d4 100644
--- a/config.def.h
+++ b/config.def.h
@@ -36,7 +36,7 @@ static const Rule rules[] = {
 };
 
 /* layout(s) */
-static const float mfact     = 0.55; /* factor of master area size [0.05..0.95] */
+static const float mfact     = 0.5; /* factor of master area size [0.05..0.95] */
 static const int nmaster     = 1;    /* number of clients in master area */
 static const int resizehints = 1;    /* 1 means respect size hints in tiled resizals */
 
@@ -95,7 +95,7 @@ static Key keys[] = {
 	{ MODKEY|ShiftMask,             XK_r,						spawn,          {.v = dmenucmd } },
 	{ MODKEY,						XK_s,						spawn,          SHCMD("startpagesearch") },
 	{ MODKEY|ShiftMask,             XK_t,						setlayout,      {.v = &layouts[0]} },
-	{ MODKEY,                       XK_z,						setmfact,       {.f = -0.05} },
+	{ MODKEY|ShiftMask,             XK_z,						setmfact,       {.f = -0.05} },
 	{ MODKEY,						XK_F5,						spawn,			SHCMD("togglemonitor") },
 	{ MODKEY,						XK_F6,						spawn,			SHCMD("toggletouchpad") },
 	{ MODKEY,						XK_F7,						spawn,			SHCMD("dmenumount") },