diff -up a/config.def.h b/config.def.h
--- a/config.def.h	2019-06-05 02:24:05.503321320 +0200
+++ b/config.def.h	2019-06-05 10:46:48.099997829 +0200
@@ -41,6 +41,8 @@ static const Layout layouts[] = {
 	{ "[]=",      tile },    /* first entry is default */
 	{ "><>",      NULL },    /* no layout function means floating behavior */
 	{ "[M]",      monocle },
+	{ "|M|",      centeredmaster },
+	{ ">M>",      centeredfloatingmaster },
 };
 
 /* key definitions */
@@ -79,6 +81,8 @@ static Key keys[] = {
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
+	{ MODKEY,                       XK_u,      setlayout,      {.v = &layouts[3]} },
+	{ MODKEY,                       XK_o,      setlayout,      {.v = &layouts[4]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
Only in a: config.def.h.orig
Only in b: dwm-bottomstack-20160719-56a31dc.diff
diff -up a/dwm.c b/dwm.c
--- a/dwm.c	2019-06-05 02:25:40.169986187 +0200
+++ b/dwm.c	2019-06-05 10:48:42.443328992 +0200
@@ -235,6 +235,8 @@ static int xerror(Display *dpy, XErrorEv
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
+static void centeredmaster(Monitor *m);
+static void centeredfloatingmaster(Monitor *m);
 
 /* variables */
 static const char broken[] = "broken";
@@ -2175,3 +2177,144 @@ main(int argc, char *argv[])
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;
 }
+
+void
+centeredmaster(Monitor *m)
+{
+	unsigned int i, n, h, mw, mx, my, oty, ety, tw;
+	float mfacts = 0, lfacts = 0, rfacts = 0;
+	Client *c;
+
+	/* count number of clients in the selected monitor */
+	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++) {
+		if (n < m->nmaster)
+			mfacts += c->cfact;
+		else if ((n - m->nmaster) % 2) 
+			lfacts += c->cfact;
+		else
+			rfacts += c->cfact;
+	}
+	if (n == 0)
+		return;
+	if(n == 1){
+		c = nexttiled(m->clients);
+		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
+		return;
+	}
+
+	/* initialize areas */
+	mw = m->ww;
+	mx = 0;
+	my = 0;
+	tw = mw;
+
+	if (n > m->nmaster) {
+		/* go mfact box in the center if more than nmaster clients */
+		mw = m->nmaster ? m->ww * m->mfact : 0;
+		tw = m->ww - mw;
+
+		if (n - m->nmaster > 1) {
+			/* only one client */
+			mx = (m->ww - mw) / 2;
+			tw = (m->ww - mw) / 2;
+		}
+	}
+
+	oty = 0;
+	ety = 0;
+	for (i = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
+	if (i < m->nmaster) {
+		/* nmaster clients are stacked vertically, in the center
+		 * of the screen */
+		h = (m->wh - my) * (c->cfact / mfacts);
+		resize(c, m->wx + mx, m->wy + my, mw - 2*c->bw,
+		      h - 2*c->bw, 0);
+		if(my + HEIGHT(c) < m->mh)
+			my += HEIGHT(c);
+		mfacts -= c->cfact;
+	} else {
+		/* stack clients are stacked vertically */
+		if ((i - m->nmaster) % 2) {
+			h = (m->wh - ety) * (c->cfact / lfacts);
+			if(m->nmaster == 0)
+				resize(c, m->wx, m->wy + ety, tw - 2*c->bw,
+			       h - 2*c->bw, 0);
+			else
+				resize(c, m->wx, m->wy + ety, tw - 2*c->bw,
+			       h - 2*c->bw, 0);
+			if(ety + HEIGHT(c) < m->mh)
+				ety += HEIGHT(c);
+			lfacts -= c->cfact;
+		} else {
+			h = (m->wh - oty) * (c->cfact / rfacts);
+			resize(c, m->wx + mx + mw, m->wy + oty,
+			       tw - 2*c->bw, h - 2*c->bw, 0);
+			if(oty + HEIGHT(c) < m->mh)
+				oty += HEIGHT(c);
+			rfacts -= c->cfact;
+		}
+	}
+}
+
+void
+centeredfloatingmaster(Monitor *m)
+{
+	unsigned int i, n, w, mh, mw, mx, mxo, my, myo, tx;
+	float mfacts = 0, sfacts = 0;
+	Client *c;
+
+	/* count number of clients in the selected monitor */
+	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++) {
+		if (n < m->nmaster)
+			mfacts += c->cfact;
+		else
+			sfacts += c->cfact;
+	}
+	if (n == 0)
+		return;
+	if(n == 1){
+		c = nexttiled(m->clients);
+		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
+		return;
+	}
+
+	/* initialize nmaster area */
+	if (n > m->nmaster) {
+		/* go mfact box in the center if more than nmaster clients */
+		if (m->ww > m->wh) {
+			mw = m->nmaster ? m->ww * m->mfact : 0;
+			mh = m->nmaster ? m->wh * 0.9 : 0;
+		} else {
+			mh = m->nmaster ? m->wh * m->mfact : 0;
+			mw = m->nmaster ? m->ww * 0.9 : 0;
+		}
+		mx = mxo = (m->ww - mw) / 2;
+		my = myo = (m->wh - mh) / 2;
+	} else {
+		/* go fullscreen if all clients are in the master area */
+		mh = m->wh;
+		mw = m->ww;
+		mx = mxo = 0;
+		my = myo = 0;
+	}
+
+	for(i = tx = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
+	if (i < m->nmaster) {
+		/* nmaster clients are stacked horizontally, in the center
+		 * of the screen */
+		w = (mw + mxo - mx) * (c->cfact / mfacts);
+		resize(c, m->wx + mx, m->wy + my, w - 2*c->bw,
+		       mh - 2*c->bw, 0);
+		if(mx + WIDTH(c) < m->mw)
+			mx += WIDTH(c);
+		mfacts -= c->cfact; 
+	} else {
+		/* stack clients are stacked horizontally */
+		w = (m->ww - tx) * (c->cfact / sfacts);
+		resize(c, m->wx + tx, m->wy, w - 2*c->bw,
+		       m->wh - 2*c->bw, 0);
+		if(tx + WIDTH(c) < m->mw)
+			tx += WIDTH(c);
+		sfacts -= c->cfact; 
+	}
+}