diff --git a/README.md b/README.md
index 4e8c117..2bff4ce 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,8 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
 
 ### Changelog:
 
+2020-03-27 - Revamped the dragmfact patch to support both horizontal and vertical layout splits as well as centered master variants
+
 2020-03-25 - Added dragcfact patch
 
 2020-03-23 - Added stacker patch
@@ -149,10 +151,11 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
       - i.e. if topbar is 0 then dmenu will appear at the bottom and if 1 then dmenu will appear at the top
 
    - dragcfact
-      - lets you resize clients' size (i.e. modify cfact) by holding modkey + shift and dragging the mouse
+      - lets you resize clients' size (i.e. modify cfact) by holding modkey + shift + right-click and dragging the mouse
 
    - [dragmfact](https://dwm.suckless.org/patches/dragmfact/)
-      - lets you resize the split in the tile layout (i.e. modify mfact) by holding the modkey and dragging the mouse
+      - lets you resize the split in layouts (i.e. modify mfact) by holding the modkey + shift + left-click and dragging the mouse
+      - this is a bespoke patch that supports vertical and horizontal layout splits as well as centered master variants
 
    - [dwmc](http://dwm.suckless.org/patches/dwmc/)
       - a simple dwmc client using a fork of fsignal to communicate with dwm
diff --git a/config.def.h b/config.def.h
index 750285e..88aa852 100644
--- a/config.def.h
+++ b/config.def.h
@@ -954,6 +954,9 @@ static Button buttons[] = {
 	#if DRAGCFACT_PATCH && CFACTS_PATCH
 	{ ClkClientWin,         MODKEY|ShiftMask,    Button3,        dragcfact,      {0} },
 	#endif // DRAGCFACT_PATCH
+	#if DRAGMFACT_PATCH
+	{ ClkClientWin,         MODKEY|ShiftMask,    Button1,        dragmfact,      {0} },
+	#endif // DRAGMFACT_PATCH
 	{ ClkTagBar,            0,                   Button1,        view,           {0} },
 	{ ClkTagBar,            0,                   Button3,        toggleview,     {0} },
 	{ ClkTagBar,            MODKEY,              Button1,        tag,            {0} },
diff --git a/dwm.c b/dwm.c
index 88b9b84..5ad3bec 100644
--- a/dwm.c
+++ b/dwm.c
@@ -2473,32 +2473,9 @@ resizemouse(const Arg *arg)
 		return;
 	horizcorner = nx < c->w / 2;
 	vertcorner = ny < c->h / 2;
-	#if DRAGMFACT_PATCH
-	if (c->isfloating || NULL == c->mon->lt[c->mon->sellt]->arrange) {
-		XWarpPointer (dpy, None, c->win, 0, 0, 0, 0,
-			horizcorner ? (-c->bw) : (c->w + c->bw - 1),
-			vertcorner ? (-c->bw) : (c->h + c->bw - 1)
-		);
-	} else {
-		XWarpPointer(dpy, None, root, 0, 0, 0, 0,
-			selmon->mx + (selmon->ww * selmon->mfact),
-			selmon->my + (selmon->wh / 2)
-		);
-	}
-	#else
 	XWarpPointer (dpy, None, c->win, 0, 0, 0, 0,
 			horizcorner ? (-c->bw) : (c->w + c->bw - 1),
 			vertcorner ? (-c->bw) : (c->h + c->bw - 1));
-	#endif // DRAGMFACT_PATCH
-	#elif DRAGMFACT_PATCH
-	if (c->isfloating || NULL == c->mon->lt[c->mon->sellt]->arrange) {
-		XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
-	} else {
-		XWarpPointer(dpy, None, root, 0, 0, 0, 0,
-			selmon->mx + (selmon->ww * selmon->mfact),
-			selmon->my + (selmon->wh / 2)
-		);
-	}
 	#else
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
 	#endif // RESIZECORNERS_PATCH
@@ -2523,7 +2500,6 @@ resizemouse(const Arg *arg)
 			nw = MAX(horizcorner ? (ocx2 - nx) : (ev.xmotion.x - ocx - 2 * c->bw + 1), 1);
 			nh = MAX(vertcorner ? (ocy2 - ny) : (ev.xmotion.y - ocy - 2 * c->bw + 1), 1);
 			#endif // RESIZECORNERS_PATCH
-			#if !DRAGMFACT_PATCH
 			if (c->mon->wx + nw >= selmon->wx && c->mon->wx + nw <= selmon->wx + selmon->ww
 			&& c->mon->wy + nh >= selmon->wy && c->mon->wy + nh <= selmon->wy + selmon->wh)
 			{
@@ -2531,7 +2507,6 @@ resizemouse(const Arg *arg)
 				&& (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
 					togglefloating(NULL);
 			}
-			#endif // DRAGMFACT_PATCH
 			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating) {
 				#if RESIZECORNERS_PATCH
 				resize(c, nx, ny, nw, nh, 1);
@@ -2556,35 +2531,9 @@ resizemouse(const Arg *arg)
 		}
 	} while (ev.type != ButtonRelease);
 	#if RESIZECORNERS_PATCH
-	#if DRAGMFACT_PATCH
-	if (c->isfloating || NULL == c->mon->lt[c->mon->sellt]->arrange) {
-		XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
-				horizcorner ? (-c->bw) : (c->w + c->bw - 1),
-				vertcorner ? (-c->bw) : (c->h + c->bw - 1));
-	} else {
-		selmon->mfact = (double) (ev.xmotion.x_root - selmon->mx) / (double) selmon->ww;
-		arrange(selmon);
-		XWarpPointer(dpy, None, root, 0, 0, 0, 0,
-			selmon->mx + (selmon->ww * selmon->mfact),
-			selmon->my + (selmon->wh / 2)
-		);
-	}
-	#else
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
 			horizcorner ? (-c->bw) : (c->w + c->bw - 1),
 			vertcorner ? (-c->bw) : (c->h + c->bw - 1));
-	#endif // DRAGMFACT_PATCH
-	#elif DRAGMFACT_PATCH
-	if (c->isfloating || NULL == c->mon->lt[c->mon->sellt]->arrange) {
-		XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
-	} else {
-		selmon->mfact = (double) (ev.xmotion.x_root - selmon->mx) / (double) selmon->ww;
-		arrange(selmon);
-		XWarpPointer(dpy, None, root, 0, 0, 0, 0,
-			selmon->mx + (selmon->ww * selmon->mfact),
-			selmon->my + (selmon->wh / 2)
-		);
-	}
 	#else
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
 	#endif // RESIZECORNERS_PATCH
@@ -2862,9 +2811,9 @@ setlayout(const Arg *arg)
 	#endif // PERTAG_PATCH
 
 	#if FLEXTILE_DELUXE_LAYOUT
-	if (selmon->lt[selmon->sellt]->preset.nmaster != -1)
+	if (selmon->lt[selmon->sellt]->preset.nmaster && selmon->lt[selmon->sellt]->preset.nmaster != -1)
 		selmon->nmaster = selmon->lt[selmon->sellt]->preset.nmaster;
-	if (selmon->lt[selmon->sellt]->preset.nstack != -1)
+	if (selmon->lt[selmon->sellt]->preset.nstack && selmon->lt[selmon->sellt]->preset.nstack != -1)
 		selmon->nstack = selmon->lt[selmon->sellt]->preset.nstack;
 
 	selmon->ltaxis[LAYOUT] = selmon->lt[selmon->sellt]->preset.layout;
diff --git a/patch/dragmfact.c b/patch/dragmfact.c
new file mode 100644
index 0000000..ee76647
--- /dev/null
+++ b/patch/dragmfact.c
@@ -0,0 +1,217 @@
+void
+dragmfact(const Arg *arg)
+{
+	unsigned int n;
+	int py, px; // pointer coordinates
+	int ax, ay, aw, ah; // area position, width and height
+	int center = 0, horizontal = 0, mirror = 0; // layout configuration
+	double fact;
+	Monitor *m;
+	XEvent ev;
+	Time lasttime = 0;
+
+	m = selmon;
+
+	#if VANITYGAPS_PATCH
+	int oh, ov, ih, iv;
+	getgaps(m, &oh, &ov, &ih, &iv, &n);
+	#else
+	for (n = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), n++);
+	#endif // VANITYGAPS_PATCH
+
+	ax = m->wx;
+	ay = m->wy;
+	ah = m->wh;
+	aw = m->ww;
+
+	/* do not allow mfact to be modified under certain conditions */
+	if (!m->lt[m->sellt]->arrange          // floating
+		|| (m->nmaster && n <= m->nmaster) // no master
+		#if MONOCLE_LAYOUT
+		|| m->lt[m->sellt]->arrange == monocle
+		#endif // MONOCLE_LAYOUT
+		#if GRIDMODE_LAYOUT
+		|| m->lt[m->sellt]->arrange == grid
+		#endif // GRIDMODE_LAYOUT
+		#if HORIZGRID_LAYOUT
+		|| m->lt[m->sellt]->arrange == horizgrid
+		#endif // HORIZGRID_LAYOUT
+		#if GAPPLESSGRID_LAYOUT
+		|| m->lt[m->sellt]->arrange == gaplessgrid
+		#endif // GAPPLESSGRID_LAYOUT
+		#if NROWGRID_LAYOUT
+		|| m->lt[m->sellt]->arrange == nrowgrid
+		#endif // NROWGRID_LAYOUT
+		#if FLEXTILE_DELUXE_LAYOUT
+		|| (m->lt[m->sellt]->arrange == flextile && m->ltaxis[LAYOUT] == NO_SPLIT)
+		#endif // FLEXTILE_DELUXE_LAYOUT
+	)
+		return;
+
+	#if FLEXTILE_DELUXE_LAYOUT
+	if (m->lt[m->sellt]->arrange == flextile) {
+		int layout = m->ltaxis[LAYOUT];
+		if (layout < 0) {
+			mirror = 1;
+			layout *= -1;
+		}
+		if (layout > FLOATING_MASTER)
+			layout -= FLOATING_MASTER;
+
+		if (layout == SPLIT_HORIZONTAL || layout == SPLIT_HORIZONTAL_DUAL_STACK)
+			horizontal = 1;
+		else if (layout == SPLIT_CENTERED_VERTICAL)
+			center = 1;
+		else if (layout == FLOATING_MASTER) {
+			center = 1;
+			if (aw < ah)
+				horizontal = 1;
+		}
+		else if (layout == SPLIT_CENTERED_HORIZONTAL) {
+			horizontal = 1;
+			center = 1;
+		}
+	}
+	#endif // FLEXTILE_DELUXE_LAYOUT
+	#if CENTEREDMASTER_LAYOUT
+	else if (m->lt[m->sellt]->arrange == centeredmaster)
+		center = 1;
+	#endif // CENTEREDMASTER_LAYOUT
+	#if CENTEREDFLOATINGMASTER_LAYOUT
+	else if (m->lt[m->sellt]->arrange == centeredfloatingmaster)
+		center = 1;
+	#endif // CENTEREDFLOATINGMASTER_LAYOUT
+	#if BSTACK_LAYOUT
+	else if (m->lt[m->sellt]->arrange == bstack)
+		horizontal = 1;
+	#endif // BSTACK_LAYOUT
+	#if BSTACKHORIZ_LAYOUT
+	else if (m->lt[m->sellt]->arrange == bstackhoriz)
+		horizontal = 1;
+	#endif // BSTACKHORIZ_LAYOUT
+
+	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+		None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
+		return;
+
+	#if VANITYGAPS_PATCH
+	ay += oh;
+	ax += ov;
+	aw -= 2*ov;
+	ah -= 2*oh;
+	#endif // VANITYGAPS_PATCH
+
+	if (center) {
+		if (horizontal) {
+			px = ax + aw / 2;
+			#if VANITYGAPS_PATCH
+			py = ay + ah / 2 + (ah - 2*ih) * (m->mfact / 2.0) + ih / 2;
+			#else
+			py = ay + ah / 2 + ah * m->mfact / 2.0;
+			#endif // VANITYGAPS_PATCH
+		} else { // vertical split
+			#if VANITYGAPS_PATCH
+			px = ax + aw / 2 + (aw - 2*iv) * m->mfact / 2.0 + iv / 2;
+			#else
+			px = ax + aw / 2 + aw * m->mfact / 2.0;
+			#endif // VANITYGAPS_PATCH
+			py = ay + ah / 2;
+		}
+	} else if (horizontal) {
+		px = ax + aw / 2;
+		if (mirror)
+			#if VANITYGAPS_PATCH
+			py = ay + (ah - ih) * (1.0 - m->mfact) + ih / 2;
+			#else
+			py = ay + (ah * (1.0 - m->mfact));
+			#endif // VANITYGAPS_PATCH
+		else
+			#if VANITYGAPS_PATCH
+			py = ay + ((ah - ih) * m->mfact) + ih / 2;
+			#else
+			py = ay + (ah * m->mfact);
+			#endif // VANITYGAPS_PATCH
+	} else { // vertical split
+		if (mirror)
+			#if VANITYGAPS_PATCH
+			px = ax + (aw - iv) * (1.0 - m->mfact) + iv / 2;
+			#else
+			px = ax + (aw * m->mfact);
+			#endif // VANITYGAPS_PATCH
+		else
+			#if VANITYGAPS_PATCH
+			px = ax + ((aw - iv) * m->mfact) + iv / 2;
+			#else
+			px = ax + (aw * m->mfact);
+			#endif // VANITYGAPS_PATCH
+		py = ay + ah / 2;
+	}
+
+	XWarpPointer(dpy, None, root, 0, 0, 0, 0, px, py);
+
+	do {
+		XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
+		switch(ev.type) {
+		case ConfigureRequest:
+		case Expose:
+		case MapRequest:
+			handler[ev.type](&ev);
+			break;
+		case MotionNotify:
+			if ((ev.xmotion.time - lasttime) <= (1000 / 40))
+				continue;
+			if (lasttime != 0) {
+				px = ev.xmotion.x;
+				py = ev.xmotion.y;
+			}
+			lasttime = ev.xmotion.time;
+
+			#if VANITYGAPS_PATCH
+			if (center)
+				if (horizontal)
+					if (py - ay > ah / 2)
+						fact = (double) 1.0 - (ay + ah - py - ih / 2) * 2 / (double) (ah - 2*ih);
+					else
+						fact = (double) 1.0 - (py - ay - ih / 2) * 2 / (double) (ah - 2*ih);
+				else
+					if (px - ax > aw / 2)
+						fact = (double) 1.0 - (ax + aw - px - iv / 2) * 2 / (double) (aw - 2*iv);
+					else
+						fact = (double) 1.0 - (px - ax - iv / 2) * 2 / (double) (aw - 2*iv);
+			else
+				if (horizontal)
+					fact = (double) (py - ay - ih / 2) / (double) (ah - ih);
+				else
+					fact = (double) (px - ax - iv / 2) / (double) (aw - iv);
+			#else
+			if (center)
+				if (horizontal)
+					if (py - ay > ah / 2)
+						fact = (double) 1.0 - (ay + ah - py) * 2 / (double) ah;
+					else
+						fact = (double) 1.0 - (py - ay) * 2 / (double) ah;
+				else
+					if (px - ax > aw / 2)
+						fact = (double) 1.0 - (ax + aw - px) * 2 / (double) aw;
+					else
+						fact = (double) 1.0 - (px - ax) * 2 / (double) aw;
+			else
+				if (horizontal)
+					fact = (double) (py - ay) / (double) ah;
+				else
+					fact = (double) (px - ax) / (double) aw;
+			#endif // VANITYGAPS_PATCH
+
+			if (!center && mirror)
+				fact = 1.0 - fact;
+
+			setmfact(&((Arg) { .f = 1.0 + fact }));
+			px = ev.xmotion.x;
+			py = ev.xmotion.y;
+			break;
+		}
+	} while (ev.type != ButtonRelease);
+
+	XUngrabPointer(dpy, CurrentTime);
+	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
\ No newline at end of file
diff --git a/patch/dragmfact.h b/patch/dragmfact.h
new file mode 100644
index 0000000..6390b71
--- /dev/null
+++ b/patch/dragmfact.h
@@ -0,0 +1 @@
+static void dragmfact(const Arg *arg);
\ No newline at end of file
diff --git a/patch/include.c b/patch/include.c
index b881f4d..5cbb942 100644
--- a/patch/include.c
+++ b/patch/include.c
@@ -167,6 +167,9 @@
 #if XRDB_PATCH && !VTCOLORS_PATCH
 #include "xrdb.c"
 #endif
+#if DRAGMFACT_PATCH
+#include "dragmfact.c"
+#endif
 /* Layouts */
 #if BSTACK_LAYOUT || BSTACKHORIZ_LAYOUT || CENTEREDMASTER_LAYOUT || CENTEREDFLOATINGMASTER_LAYOUT || COLUMNS_LAYOUT || DECK_LAYOUT || TILE_LAYOUT
 #include "layout_facts.c"
diff --git a/patch/include.h b/patch/include.h
index 9556675..5d6ee6c 100644
--- a/patch/include.h
+++ b/patch/include.h
@@ -29,6 +29,9 @@
 #if DRAGCFACT_PATCH && CFACTS_PATCH
 #include "dragcfact.h"
 #endif
+#if DRAGMFACT_PATCH
+#include "dragmfact.h"
+#endif
 #if DWMC_PATCH
 #include "dwmc.h"
 #elif FSIGNAL_PATCH
diff --git a/patch/vanitygaps.h b/patch/vanitygaps.h
index 5667be2..6c8d5cf 100644
--- a/patch/vanitygaps.h
+++ b/patch/vanitygaps.h
@@ -10,7 +10,7 @@ static void incrivgaps(const Arg *arg);
 static void togglegaps(const Arg *arg);
 
 /* Internals */
-#if CENTEREDMASTER_LAYOUT || CENTEREDFLOATINGMASTER_LAYOUT || COLUMNS_LAYOUT || DECK_LAYOUT || FIBONACCI_DWINDLE_LAYOUT || FIBONACCI_SPIRAL_LAYOUT || GAPPLESSGRID_LAYOUT || NROWGRID_LAYOUT || HORIZGRID_LAYOUT || BSTACK_LAYOUT || BSTACKHORIZ_LAYOUT || GRIDMODE_LAYOUT || FLEXTILE_DELUXE_LAYOUT || TILE_LAYOUT || (VANITYGAPS_MONOCLE_PATCH && MONOCLE_LAYOUT)
+#if DRAGMFACT_PATCH || CENTEREDMASTER_LAYOUT || CENTEREDFLOATINGMASTER_LAYOUT || COLUMNS_LAYOUT || DECK_LAYOUT || FIBONACCI_DWINDLE_LAYOUT || FIBONACCI_SPIRAL_LAYOUT || GAPPLESSGRID_LAYOUT || NROWGRID_LAYOUT || HORIZGRID_LAYOUT || BSTACK_LAYOUT || BSTACKHORIZ_LAYOUT || GRIDMODE_LAYOUT || FLEXTILE_DELUXE_LAYOUT || TILE_LAYOUT || (VANITYGAPS_MONOCLE_PATCH && MONOCLE_LAYOUT)
 static void getgaps(Monitor *m, int *oh, int *ov, int *ih, int *iv, unsigned int *nc);
 #endif
 static void setgaps(int oh, int ov, int ih, int iv);
\ No newline at end of file