diff -r 131d4f6a8a1e config.def.h
--- a/config.def.h	Fri Jul 29 20:01:22 2011 +0200
+++ b/config.def.h	Sun Jul 31 08:52:30 2011 -0400
@@ -34,7 +34,22 @@
 };
 
 /* key definitions */
+#define MODBUT Mod1Mask
 #define MODKEY Mod1Mask
+
+/* use prefix key if defined, modifiers if undefined */
+#define PREKEY XK_t
+#define MODPRE ControlMask
+
+/* Prefix keys setup */
+#ifdef PREKEY
+#define MODKEY 0
+#define prekeys prefixkeys
+#else
+#define MODKEY MODKBD
+#define prekeys keys
+#endif
+
 #define TAGKEYS(KEY,TAG) \
 	{ MODKEY,                       KEY,      view,           {.ui = 1 << TAG} }, \
 	{ MODKEY|ControlMask,           KEY,      toggleview,     {.ui = 1 << TAG} }, \
@@ -50,6 +65,9 @@
 
 static Key keys[] = {
 	/* modifier                     key        function        argument */
+#ifdef PREKEY
+	{ MODPRE,                       PREKEY,    prefixlit,	   {0} },
+#endif
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
 	{ MODKEY|ShiftMask,             XK_Return, spawn,          {.v = termcmd } },
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
@@ -83,6 +101,10 @@
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
 };
 
+static Key prefixkeys[] = {
+	{ MODPRE,			XK_t,      prefix,         {0} },
+};
+
 /* button definitions */
 /* click can be ClkLtSymbol, ClkStatusText, ClkWinTitle, ClkClientWin, or ClkRootWin */
 static Button buttons[] = {
@@ -91,12 +113,12 @@
 	{ ClkLtSymbol,          0,              Button3,        setlayout,      {.v = &layouts[2]} },
 	{ ClkWinTitle,          0,              Button2,        zoom,           {0} },
 	{ ClkStatusText,        0,              Button2,        spawn,          {.v = termcmd } },
-	{ ClkClientWin,         MODKEY,         Button1,        movemouse,      {0} },
-	{ ClkClientWin,         MODKEY,         Button2,        togglefloating, {0} },
-	{ ClkClientWin,         MODKEY,         Button3,        resizemouse,    {0} },
+	{ ClkClientWin,         MODBUT,         Button1,        movemouse,      {0} },
+	{ ClkClientWin,         MODBUT,         Button2,        togglefloating, {0} },
+	{ ClkClientWin,         MODBUT,         Button3,        resizemouse,    {0} },
 	{ ClkTagBar,            0,              Button1,        view,           {0} },
 	{ ClkTagBar,            0,              Button3,        toggleview,     {0} },
-	{ ClkTagBar,            MODKEY,         Button1,        tag,            {0} },
-	{ ClkTagBar,            MODKEY,         Button3,        toggletag,      {0} },
+	{ ClkTagBar,            MODBUT,         Button1,        tag,            {0} },
+	{ ClkTagBar,            MODBUT,         Button3,        toggletag,      {0} },
 };
 
diff -r 131d4f6a8a1e dwm.c
--- a/dwm.c	Fri Jul 29 20:01:22 2011 +0200
+++ b/dwm.c	Sun Jul 31 08:52:30 2011 -0400
@@ -191,6 +191,7 @@
 static void grabkeys(void);
 static void initfont(const char *fontstr);
 static void keypress(XEvent *e);
+static int  keysymfunc(Key *ks, unsigned int l, KeySym keysym, unsigned int state);
 static void killclient(const Arg *arg);
 static void manage(Window w, XWindowAttributes *wa);
 static void mappingnotify(XEvent *e);
@@ -201,6 +202,8 @@
 static void pop(Client *);
 static void propertynotify(XEvent *e);
 static Monitor *ptrtomon(int x, int y);
+static void prefix(const Arg *arg);
+static void prefixlit(const Arg *arg);
 static void quit(const Arg *arg);
 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
 static void resizeclient(Client *c, int x, int y, int w, int h);
@@ -1015,10 +1018,10 @@
 		KeyCode code;
 
 		XUngrabKey(dpy, AnyKey, AnyModifier, root);
-		for(i = 0; i < LENGTH(keys); i++)
-			if((code = XKeysymToKeycode(dpy, keys[i].keysym)))
+		for(i = 0; i < LENGTH(prekeys); i++)
+			if((code = XKeysymToKeycode(dpy, prekeys[i].keysym)))
 				for(j = 0; j < LENGTH(modifiers); j++)
-					XGrabKey(dpy, code, keys[i].mod | modifiers[j], root,
+					XGrabKey(dpy, code, prekeys[i].mod | modifiers[j], root,
 						 True, GrabModeAsync, GrabModeAsync);
 	}
 }
@@ -1070,17 +1073,26 @@
 
 void
 keypress(XEvent *e) {
-	unsigned int i;
 	KeySym keysym;
-	XKeyEvent *ev;
 
-	ev = &e->xkey;
-	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
-	for(i = 0; i < LENGTH(keys); i++)
-		if(keysym == keys[i].keysym
-		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
-		&& keys[i].func)
-			keys[i].func(&(keys[i].arg));
+	keysym = XKeycodeToKeysym(dpy, (KeyCode)e->xkey.keycode, 0);
+	keysymfunc(prekeys,LENGTH(prekeys),keysym,e->xkey.state);
+	/* Ignore return value. */
+}
+
+int
+keysymfunc(Key *ks,unsigned int l,KeySym keysym,unsigned int state) {
+ 	unsigned int i;
+
+	for(i = 0; i < l; i++)
+		if(keysym == ks[i].keysym
+		&& CLEANMASK(ks[i].mod) == CLEANMASK(state)
+		&& ks[i].func) {
+			ks[i].func(&(ks[i].arg));
+		return 1;
+	}
+
+	return 0;
 }
 
 void
@@ -1609,6 +1621,55 @@
 }
 
 void
+prefix(const Arg *arg) {
+	XEvent ev;
+	KeySym keysym;
+	Window win;
+
+	if (selmon->sel) {
+		win = selmon->sel->win;
+	}
+	else {
+		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+		win = root;
+	}
+	XGrabPointer (dpy, win, True, 0,
+		GrabModeAsync, GrabModeAsync,
+		None, cursor[CurMove], CurrentTime);
+	XGrabKeyboard(dpy, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
+
+	do {
+		if (!running)
+			return;
+		XMaskEvent(dpy, KeyPressMask|KeyRelease, &ev);
+		keysym = XKeycodeToKeysym(dpy, (KeyCode)ev.xkey.keycode, 0);
+	} while (IsModifierKey(keysym) || KeyRelease == ev.xkey.type);
+
+	XUngrabKeyboard(dpy, CurrentTime);
+	XUngrabPointer(dpy, CurrentTime);
+
+	keysymfunc(keys,LENGTH(keys),keysym,ev.xkey.state);
+	/* Ignore return value. */
+}
+
+void
+prefixlit(const Arg *arg) {
+	XEvent ev;
+
+	if (!selmon->sel || !selmon->sel->win)
+		return;
+
+	ev.xkey.type = KeyPress;
+	ev.xkey.display = dpy;
+	ev.xkey.window = selmon->sel->win;
+	ev.xkey.state = MODPRE;
+	ev.xkey.keycode = XKeysymToKeycode(dpy, PREKEY);
+
+	XSendEvent(dpy, selmon->sel->win, False, KeyPressMask, &ev);
+	XSync (dpy, False);
+}
+
+void
 spawn(const Arg *arg) {
 	if(fork() == 0) {
 		if(dpy)