made shortcuts like proposed by Sander, renamed viewextend to toggleview (more clear)

config.arg.h

@@ -32,9 +32,9 @@ static Key key[] = { \
 			"awk 'NF>2 && $1 ~ /^[^d].*x/ {print $NF}' | sort | uniq | dmenu`" } }, \
 	{ MODKEY,			XK_space,	togglemode,	{ 0 } }, \
 	{ MODKEY,			XK_Return,	zoom,		{ 0 } }, \
-	{ MODKEY|ControlMask,		XK_1,		appendtag,	{ .i = 0 } }, \
+	{ MODKEY|ControlMask,		XK_1,		toggleview,	{ .i = 0 } }, \
-	{ MODKEY|ControlMask,		XK_2,		appendtag,	{ .i = 1 } }, \
+	{ MODKEY|ControlMask,		XK_2,		toggleview,	{ .i = 1 } }, \
-	{ MODKEY|ControlMask,		XK_3,		appendtag,	{ .i = 2 } }, \
+	{ MODKEY|ControlMask,		XK_3,		toggleview,	{ .i = 2 } }, \
 	{ MODKEY|ShiftMask,		XK_1,		replacetag,	{ .i = 0 } }, \
 	{ MODKEY|ShiftMask,		XK_2,		replacetag,	{ .i = 1 } }, \
 	{ MODKEY|ShiftMask,		XK_3,		replacetag,	{ .i = 2 } }, \
@@ -43,9 +43,9 @@ static Key key[] = { \
 	{ MODKEY|ShiftMask,		XK_Return,	spawn, \
 		{ .cmd = "exec urxvt +sb -tr -bg black -fg '#eeeeee' -cr '#eeeeee' +sb " \
 			"-fn '-*-terminus-medium-*-*-*-12-*-*-*-*-*-iso10646-*'" } }, \
-	{ MODKEY|ControlMask|ShiftMask,	XK_1,		viewextend,	{ .i = 0 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_1,		appendtag,	{ .i = 0 } }, \
-	{ MODKEY|ShiftMask,		XK_2,		viewextend,	{ .i = 1 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_2,		appendtag,	{ .i = 1 } }, \
-	{ MODKEY|ShiftMask,		XK_3,		viewextend,	{ .i = 2 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_3,		appendtag,	{ .i = 2 } }, \
 };
 
 #define RULES \

config.default.h

@@ -31,11 +31,11 @@ static Key key[] = { \
 	{ MODKEY,			XK_m,		togglemax,	{ 0 } }, \
 	{ MODKEY,			XK_space,	togglemode,	{ 0 } }, \
 	{ MODKEY,			XK_Return,	zoom,		{ 0 } }, \
-	{ MODKEY|ControlMask,		XK_0,		appendtag,	{ .i = 0 } }, \
+	{ MODKEY|ControlMask,		XK_0,		toggleview,	{ .i = 0 } }, \
-	{ MODKEY|ControlMask,		XK_1,		appendtag,	{ .i = 1 } }, \
+	{ MODKEY|ControlMask,		XK_1,		toggleview,	{ .i = 1 } }, \
-	{ MODKEY|ControlMask,		XK_2,		appendtag,	{ .i = 2 } }, \
+	{ MODKEY|ControlMask,		XK_2,		toggleview,	{ .i = 2 } }, \
-	{ MODKEY|ControlMask,		XK_3,		appendtag,	{ .i = 3 } }, \
+	{ MODKEY|ControlMask,		XK_3,		toggleview,	{ .i = 3 } }, \
-	{ MODKEY|ControlMask,		XK_4,		appendtag,	{ .i = 4 } }, \
+	{ MODKEY|ControlMask,		XK_4,		toggleview,	{ .i = 4 } }, \
 	{ MODKEY|ShiftMask,		XK_0,		replacetag,	{ .i = 0 } }, \
 	{ MODKEY|ShiftMask,		XK_1,		replacetag,	{ .i = 1 } }, \
 	{ MODKEY|ShiftMask,		XK_2,		replacetag,	{ .i = 2 } }, \
@@ -44,11 +44,11 @@ static Key key[] = { \
 	{ MODKEY|ShiftMask,		XK_c,		killclient,	{ 0 } }, \
 	{ MODKEY|ShiftMask,		XK_q,		quit,		{ 0 } }, \
 	{ MODKEY|ShiftMask,		XK_Return,	spawn,		{ .cmd = "exec xterm" } }, \
-	{ MODKEY|ControlMask|ShiftMask,	XK_0,		viewextend,	{ .i = 0 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_0,		appendtag,	{ .i = 0 } }, \
-	{ MODKEY|ControlMask|ShiftMask,	XK_1,		viewextend,	{ .i = 1 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_1,		appendtag,	{ .i = 1 } }, \
-	{ MODKEY|ControlMask|ShiftMask,	XK_2,		viewextend,	{ .i = 2 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_2,		appendtag,	{ .i = 2 } }, \
-	{ MODKEY|ControlMask|ShiftMask,	XK_3,		viewextend,	{ .i = 3 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_3,		appendtag,	{ .i = 3 } }, \
-	{ MODKEY|ControlMask|ShiftMask,	XK_4,		viewextend,	{ .i = 4 } }, \
+	{ MODKEY|ControlMask|ShiftMask,	XK_4,		appendtag,	{ .i = 4 } }, \
 };
 
 #define RULES \

dwm.h

@@ -128,7 +128,7 @@ extern void replacetag(Arg *arg);
 extern void settags(Client *c);
 extern void togglemode(Arg *arg);
 extern void view(Arg *arg);
-extern void viewextend(Arg *arg);
+extern void toggleview(Arg *arg);
 extern void viewnext(Arg *arg);
 extern void viewprev(Arg *arg);
 

event.c

@@ -109,7 +109,7 @@ buttonpress(XEvent *e)
 				x += textw(tags[a.i]);
 				if(ev->x < x) {
 					if(ev->button == Button3)
-						viewextend(&a);
+						toggleview(&a);
 					else
 						view(&a);
 					return;

tag.c

@@ -252,7 +252,7 @@ view(Arg *arg)
 }
 
 void
-viewextend(Arg *arg)
+toggleview(Arg *arg)
 {
 	unsigned int i;