diff -up dwm-5.5/config.def.h dwm-5.5.mt/config.def.h
--- dwm-5.5/config.def.h	2009-04-18 13:49:24.000000000 +0200
+++ dwm-5.5.mt/config.def.h	2009-06-18 20:49:40.000000000 +0200
@@ -67,6 +67,10 @@ static Key keys[] = {
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
+	{ MODKEY,                       XK_Left,   prevview,       {0} },
+	{ MODKEY,                       XK_Right,  nextview,       {0} },
+	{ MODKEY|ShiftMask,             XK_Left,   prevtag,        {0} },
+	{ MODKEY|ShiftMask,             XK_Right,  nexttag,        {0} },
 	{ MODKEY|ShiftMask,             XK_0,      tag,            {.ui = ~0 } },
 	TAGKEYS(                        XK_1,                      0)
 	TAGKEYS(                        XK_2,                      1)
diff -up dwm-5.5/dwm.1 dwm-5.5.mt/dwm.1
--- dwm-5.5/dwm.1	2009-04-18 13:49:24.000000000 +0200
+++ dwm-5.5.mt/dwm.1	2009-06-18 21:00:46.000000000 +0200
@@ -96,6 +96,18 @@ Toggle focused window between tiled and 
 .B Mod1\-Tab
 Toggles to the previously selected tags.
 .TP
+.B Mod1\-Left
+View windows with previous tag
+.TP
+.B Mod1\-Right
+View windows with next tag
+.TP
+.B Mod1\-Shift\-Left
+Apply previous tag to focused window
+.TP
+.B Mod1\-Shift\-Right
+Apply next tag to focused window
+.TP
 .B Mod1\-Shift\-[1..n]
 Apply
 .RB nth
diff -up dwm-5.5/dwm.c dwm-5.5.mt/dwm.c
--- dwm-5.5/dwm.c	2009-04-18 13:49:24.000000000 +0200
+++ dwm-5.5.mt/dwm.c	2009-06-18 20:55:46.000000000 +0200
@@ -167,7 +167,11 @@ static void mappingnotify(XEvent *e);
 static void maprequest(XEvent *e);
 static void monocle(void);
 static void movemouse(const Arg *arg);
+static void nexttag(const Arg *arg);
 static Client *nexttiled(Client *c);
+static void nextview(const Arg *arg);
+static void prevview(const Arg *arg);
+static void prevtag(const Arg *arg);
 static void propertynotify(XEvent *e);
 static void quit(const Arg *arg);
 static void resize(Client *c, int x, int y, int w, int h);
@@ -1047,6 +1051,17 @@ movemouse(const Arg *arg) {
 	XUngrabPointer(dpy, CurrentTime);
 }
 
+void
+nexttag(const Arg *arg) {
+	if(sel) {
+		if (sel->tags < (1 << (LENGTH(tags)-1)))
+			sel->tags = (sel->tags << 1) & TAGMASK;
+		else
+			sel->tags = 1 & TAGMASK;
+		arrange();
+	}
+}
+
 Client *
 nexttiled(Client *c) {
 	for(; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
@@ -1054,6 +1069,47 @@ nexttiled(Client *c) {
 }
 
 void
+nextview(const Arg *arg) {
+	unsigned int mask;
+
+	if (tagset[seltags] >= (1 << (LENGTH(tags)-1)))
+		mask = 1 & TAGMASK;
+	else
+		mask = (tagset[seltags] << 1) & TAGMASK;
+
+	if(mask) {
+		tagset[seltags] = mask;
+		arrange();
+	}
+}
+
+void
+prevtag(const Arg *arg) {
+	if(sel) {
+		if (sel->tags > 1)
+			sel->tags = (sel->tags >> 1) & TAGMASK;
+		else
+			sel->tags = (1 << (LENGTH(tags) - 1)) & TAGMASK;
+		arrange();
+	}
+}
+
+void
+prevview(const Arg *arg) {
+	unsigned int mask;
+
+	if (tagset[seltags] <= 1)
+		mask = (1 << (LENGTH(tags) - 1)) & TAGMASK;
+	else
+		mask = (tagset[seltags] >> 1) & TAGMASK;
+
+	if(mask) {
+                tagset[seltags] = mask;
+                arrange();
+        }
+}
+
+void
 propertynotify(XEvent *e) {
 	Client *c;
 	Window trans;