diff --git a/config.h b/config.h
index a39cd24..e5df7aa 100644
--- a/config.h
+++ b/config.h
@@ -1,9 +1,3 @@
-#ifdef _GENERAL_CONFIG
-
-/* enable external commands (defined below)? 0 = off, 1 = on:  */
-enum { EXT_COMMANDS = 0 };
-
-#endif
 #ifdef _WINDOW_CONFIG
 
 /* default window dimensions (overwritten via -g option):      */
@@ -42,79 +36,80 @@ enum { THUMB_SIZE = 60 };
 
 /* keyboard mappings for image and thumbnail mode:             */
 static const keymap_t keys[] = {
-	/* key              function            argument */
-	{ XK_q,             quit,               None },
-	{ XK_r,             reload,             None },
-	{ XK_f,             toggle_fullscreen,  None },
-	{ XK_a,             toggle_antialias,   None },
-	{ XK_A,             toggle_alpha,       None },
-	{ XK_Return,        switch_mode,        None },
-
-	{ XK_g,             first,              None },
-	{ XK_G,             last,               None },
-	{ XK_n,             navigate,           +1 },
-	{ XK_space,         navigate,           +1 },
-	{ XK_p,             navigate,           -1 },
-	{ XK_BackSpace,     navigate,           -1 },
-	{ XK_bracketright,  navigate,           +10 },
-	{ XK_bracketleft,   navigate,           -10 },
-
-	{ XK_D,             remove_image,       None },
-
-	{ XK_h,             move,               DIR_LEFT },
-	{ XK_Left,          move,               DIR_LEFT },
-	{ XK_j,             move,               DIR_DOWN },
-	{ XK_Down,          move,               DIR_DOWN },
-	{ XK_k,             move,               DIR_UP },
-	{ XK_Up,            move,               DIR_UP },
-	{ XK_l,             move,               DIR_RIGHT },
-	{ XK_Right,         move,               DIR_RIGHT },
-
-	{ XK_braceleft,     pan_screen,         DIR_LEFT },
-	{ XK_Next,          pan_screen,         DIR_DOWN },
-	{ XK_Prior,         pan_screen,         DIR_UP },
-	{ XK_braceright,    pan_screen,         DIR_RIGHT },
-
-	{ XK_H,             pan_edge,           DIR_LEFT },
-	{ XK_J,             pan_edge,           DIR_DOWN },
-	{ XK_K,             pan_edge,           DIR_UP },
-	{ XK_L,             pan_edge,           DIR_RIGHT },
-
-	{ XK_plus,          zoom,               +1 },
-	{ XK_equal,         zoom,               +1 },
-	{ XK_KP_Add,        zoom,               +1 },
-	{ XK_minus,         zoom,               -1 },
-	{ XK_KP_Subtract,   zoom,               -1 },
-	{ XK_0,             zoom,               0 },
-	{ XK_KP_0,          zoom,               0 },
-	{ XK_w,             fit_to_win,         None },
-	{ XK_W,             fit_to_img,         None },
-
-	{ XK_less,          rotate,             DIR_LEFT },
-	{ XK_greater,       rotate,             DIR_RIGHT },
-};
-
-/* external commands and corresponding key mappings:           */
-static const command_t commands[] = {
-	/* ctrl-...    reload?  command, '#' is replaced by filename */
-	{ XK_comma,    True,    "jpegtran -rotate 270 -copy all -outfile # #" },
-	{ XK_period,   True,    "jpegtran -rotate 90 -copy all -outfile # #" },
-	{ XK_less,     True,    "mogrify -rotate -90 #" },
-	{ XK_greater,  True,    "mogrify -rotate +90 #" }
+	/* ctrl    key              function           argument      */
+	{ False,   XK_q,            quit,              (arg_t) None },
+	{ False,   XK_r,            reload,            (arg_t) None },
+	{ False,   XK_f,            toggle_fullscreen, (arg_t) None },
+	{ False,   XK_a,            toggle_antialias,  (arg_t) None },
+	{ False,   XK_A,            toggle_alpha,      (arg_t) None },
+	{ False,   XK_Return,       switch_mode,       (arg_t) None },
+
+	{ False,   XK_g,            first,             (arg_t) None },
+	{ False,   XK_G,            last,              (arg_t) None },
+	{ False,   XK_n,            navigate,          (arg_t) +1 },
+	{ False,   XK_space,        navigate,          (arg_t) +1 },
+	{ False,   XK_p,            navigate,          (arg_t) -1 },
+	{ False,   XK_BackSpace,    navigate,          (arg_t) -1 },
+	{ False,   XK_bracketright, navigate,          (arg_t) +10 },
+	{ False,   XK_bracketleft,  navigate,          (arg_t) -10 },
+
+	{ False,   XK_D,            remove_image,      (arg_t) None },
+
+	{ False,   XK_h,            move,              (arg_t) DIR_LEFT },
+	{ False,   XK_Left,         move,              (arg_t) DIR_LEFT },
+	{ False,   XK_j,            move,              (arg_t) DIR_DOWN },
+	{ False,   XK_Down,         move,              (arg_t) DIR_DOWN },
+	{ False,   XK_k,            move,              (arg_t) DIR_UP },
+	{ False,   XK_Up,           move,              (arg_t) DIR_UP },
+	{ False,   XK_l,            move,              (arg_t) DIR_RIGHT },
+	{ False,   XK_Right,        move,              (arg_t) DIR_RIGHT },
+
+	{ False,   XK_braceleft,    pan_screen,        (arg_t) DIR_LEFT },
+	{ False,   XK_Next,         pan_screen,        (arg_t) DIR_DOWN },
+	{ False,   XK_Prior,        pan_screen,        (arg_t) DIR_UP },
+	{ False,   XK_braceright,   pan_screen,        (arg_t) DIR_RIGHT },
+
+	{ False,   XK_H,            pan_edge,          (arg_t) DIR_LEFT },
+	{ False,   XK_J,            pan_edge,          (arg_t) DIR_DOWN },
+	{ False,   XK_K,            pan_edge,          (arg_t) DIR_UP },
+	{ False,   XK_L,            pan_edge,          (arg_t) DIR_RIGHT },
+
+	{ False,   XK_plus,         zoom,              (arg_t) +1 },
+	{ False,   XK_equal,        zoom,              (arg_t) +1 },
+	{ False,   XK_KP_Add,       zoom,              (arg_t) +1 },
+	{ False,   XK_minus,        zoom,              (arg_t) -1 },
+	{ False,   XK_KP_Subtract,  zoom,              (arg_t) -1 },
+	{ False,   XK_0,            zoom,              (arg_t) None },
+	{ False,   XK_KP_0,         zoom,              (arg_t) None },
+	{ False,   XK_w,            fit_to_win,        (arg_t) None },
+	{ False,   XK_W,            fit_to_img,        (arg_t) None },
+
+	{ False,   XK_less,         rotate,            (arg_t) DIR_LEFT },
+	{ False,   XK_greater,      rotate,            (arg_t) DIR_RIGHT },
+
+	                            /* open the current image with given program:  */
+	{ True,    XK_g,            open_with,         (arg_t) "gimp" },
+
+	                            /* run shell command line on the current file,
+	                             * '#' is replaced by filename:                */
+	{ True,    XK_less,         run_command,       (arg_t) "mogrify -rotate -90 #" },
+	{ True,    XK_greater,      run_command,       (arg_t) "mogrify -rotate +90 #" },
+	{ True,    XK_comma,        run_command,       (arg_t) "jpegtran -rotate 270 -copy all -outfile # #" },
+	{ True,    XK_period,       run_command,       (arg_t) "jpegtran -rotate 90 -copy all -outfile # #" },
 };
 
 /* mouse button mappings for image mode:                       */
 static const button_t buttons[] = {
-	/* modifier     button       function    argument            */
-	{ None,         Button1,     navigate,   +1 },
-	{ None,         Button3,     navigate,   -1 },
-	{ None,         Button2,     drag,       None },
-	{ None,         Button4,     move,       DIR_UP },
-	{ None,         Button5,     move,       DIR_DOWN },
-	{ ShiftMask,    Button4,     move,       DIR_LEFT },
-	{ ShiftMask,    Button5,     move,       DIR_RIGHT },
-	{ ControlMask,  Button4,     zoom,       +1 },
-	{ ControlMask,  Button5,     zoom,       -1 },
+	/* ctrl    shift    button       function      argument      */
+	{ False,   False,   Button1,     navigate,     (arg_t) +1 },
+	{ False,   False,   Button3,     navigate,     (arg_t) -1 },
+	{ False,   False,   Button2,     drag,         (arg_t) None },
+	{ False,   False,   Button4,     move,         (arg_t) DIR_UP },
+	{ False,   False,   Button5,     move,         (arg_t) DIR_DOWN },
+	{ False,   True,    Button4,     move,         (arg_t) DIR_LEFT },
+	{ False,   True,    Button5,     move,         (arg_t) DIR_RIGHT },
+	{ True,    False,   Button4,     zoom,         (arg_t) +1 },
+	{ True,    False,   Button5,     zoom,         (arg_t) -1 },
 };
 
 #endif
diff --git a/events.c b/events.c
index 03ea292..618aa3a 100644
--- a/events.c
+++ b/events.c
@@ -58,62 +58,6 @@ extern int filecnt, fileidx;
 int timo_cursor;
 int timo_redraw;
 
-int run_command(const char *cline, Bool reload) {
-	int fncnt, fnlen;
-	char *cn, *cmdline;
-	const char *co, *fname;
-	pid_t pid;
-	int ret, status;
-
-	if (!cline || !*cline)
-		return 0;
-
-	fncnt = 0;
-	co = cline - 1;
-	while ((co = strchr(co + 1, '#')))
-		fncnt++;
-
-	if (!fncnt)
-		return 0;
-
-	ret = 0;
-	fname = filenames[mode == MODE_NORMAL ? fileidx : tns.sel];
-	fnlen = strlen(fname);
-	cn = cmdline = (char*) s_malloc((strlen(cline) + fncnt * (fnlen + 2)) *
-	                                sizeof(char));
-
-	/* replace all '#' with filename */
-	for (co = cline; *co; co++) {
-		if (*co == '#') {
-			*cn++ = '"';
-			strcpy(cn, fname);
-			cn += fnlen;
-			*cn++ = '"';
-		} else {
-			*cn++ = *co;
-		}
-	}
-	*cn = '\0';
-
-	if ((pid = fork()) == 0) {
-		execlp("/bin/sh", "/bin/sh", "-c", cmdline, NULL);
-		warn("could not exec: /bin/sh");
-		exit(1);
-	} else if (pid < 0) {
-		warn("could not fork. command line was: %s", cmdline);
-	} else if (reload) {
-		waitpid(pid, &status, 0);
-		if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
-			ret = 1;
-		else
-			warn("child exited with non-zero return value: %d. command line was: %s",
-			     WEXITSTATUS(status), cmdline);
-	}
-	
-	free(cmdline);
-	return ret;
-}
-
 void redraw() {
 	if (mode == MODE_NORMAL) {
 		img_render(&img, &win);
@@ -128,6 +72,15 @@ void redraw() {
 	timo_redraw = 0;
 }
 
+Bool keymask(const keymap_t *k, unsigned int state) {
+	return (k->ctrl ? ControlMask : 0) == (state & ControlMask);
+}
+
+Bool buttonmask(const button_t *b, unsigned int state) {
+	return ((b->ctrl ? ControlMask : 0) | (b->shift ? ShiftMask : 0)) ==
+	       (state & (ControlMask | ShiftMask));
+}
+
 void on_keypress(XKeyEvent *kev) {
 	int i;
 	KeySym ksym;
@@ -138,38 +91,9 @@ void on_keypress(XKeyEvent *kev) {
 
 	XLookupString(kev, &key, 1, &ksym, NULL);
 
-	if (EXT_COMMANDS && (CLEANMASK(kev->state) & ControlMask)) {
-		for (i = 0; i < LEN(commands); i++) {
-			if (commands[i].ksym == ksym) {
-				win_set_cursor(&win, CURSOR_WATCH);
-				if (run_command(commands[i].cmdline, commands[i].reload)) {
-					if (mode == MODE_NORMAL) {
-						if (fileidx < tns.cnt)
-							tns_load(&tns, fileidx, filenames[fileidx], 1);
-						img_close(&img, 1);
-						load_image(fileidx);
-					} else {
-						if (!tns_load(&tns, tns.sel, filenames[tns.sel], 0)) {
-							remove_file(tns.sel, 0);
-							tns.dirty = 1;
-							if (tns.sel >= tns.cnt)
-								tns.sel = tns.cnt - 1;
-						}
-					}
-					redraw();
-				}
-				if (mode == MODE_THUMBS)
-					win_set_cursor(&win, CURSOR_ARROW);
-				else if (!timo_cursor)
-					win_set_cursor(&win, CURSOR_NONE);
-				return;
-			}
-		}
-	}
-
 	for (i = 0; i < LEN(keys); i++) {
-		if (ksym == keys[i].ksym && keys[i].handler) {
-			if (keys[i].handler(keys[i].arg))
+		if (keymask(&keys[i], kev->state) && ksym == keys[i].ksym) {
+			if (keys[i].handler && keys[i].handler(keys[i].arg))
 				redraw();
 			return;
 		}
@@ -187,10 +111,10 @@ void on_buttonpress(XButtonEvent *bev) {
 		timo_cursor = TO_CURSOR_HIDE;
 
 		for (i = 0; i < LEN(buttons); i++) {
-			if (CLEANMASK(bev->state) == CLEANMASK(buttons[i].mod) &&
-			    bev->button == buttons[i].button && buttons[i].handler)
+			if (buttonmask(&buttons[i], bev->state) &&
+			    bev->button == buttons[i].button)
 			{
-				if (buttons[i].handler(buttons[i].arg))
+				if (buttons[i].handler && buttons[i].handler(buttons[i].arg))
 					redraw();
 				return;
 			}
@@ -379,7 +303,9 @@ int switch_mode(arg_t a) {
 	return 1;
 }
 
-int navigate(arg_t n) {
+int navigate(arg_t a) {
+	int n = (int) a;
+
 	if (mode == MODE_NORMAL) {
 		n += fileidx;
 		if (n < 0)
@@ -437,21 +363,27 @@ int remove_image(arg_t a) {
 	}
 }
 
-int move(arg_t dir) {
+int move(arg_t a) {
+	direction_t dir = (direction_t) a;
+
 	if (mode == MODE_NORMAL)
 		return img_pan(&img, &win, dir, 0);
 	else
 		return tns_move_selection(&tns, &win, dir);
 }
 
-int pan_screen(arg_t dir) {
+int pan_screen(arg_t a) {
+	direction_t dir = (direction_t) a;
+
 	if (mode == MODE_NORMAL)
 		return img_pan(&img, &win, dir, 1);
 	else
 		return 0;
 }
 
-int pan_edge(arg_t dir) {
+int pan_edge(arg_t a) {
+	direction_t dir = (direction_t) a;
+
 	if (mode == MODE_NORMAL)
 		return img_pan_edge(&img, &win, dir);
 	else
@@ -459,7 +391,7 @@ int pan_edge(arg_t dir) {
 }
 
 /* Xlib helper function for drag() */
-Bool ismnotify(Display *d, XEvent *e, XPointer a) {
+Bool is_motionnotify(Display *d, XEvent *e, XPointer a) {
 	return e != NULL && e->type == MotionNotify;
 }
 
@@ -498,7 +430,7 @@ int drag(arg_t a) {
 				break;
 		}
 		if (dragging)
-			next = XCheckIfEvent(win.env.dpy, &e, ismnotify, None);
+			next = XCheckIfEvent(win.env.dpy, &e, is_motionnotify, None);
 		if ((!dragging || !next) && (dx != 0 || dy != 0)) {
 			if (img_move(&img, &win, dx, dy))
 				img_render(&img, &win);
@@ -513,7 +445,9 @@ int drag(arg_t a) {
 	return 0;
 }
 
-int rotate(arg_t dir) {
+int rotate(arg_t a) {
+	direction_t dir = (direction_t) a;
+
 	if (mode == MODE_NORMAL) {
 		if (dir == DIR_LEFT) {
 			img_rotate_left(&img, &win);
@@ -526,7 +460,9 @@ int rotate(arg_t dir) {
 	return 0;
 }
 
-int zoom(arg_t scale) {
+int zoom(arg_t a) {
+	int scale = (int) a;
+
 	if (mode != MODE_NORMAL)
 		return 0;
 	if (scale > 0)
@@ -537,7 +473,9 @@ int zoom(arg_t scale) {
 		return img_zoom(&img, &win, 1.0);
 }
 
-int fit_to_win(arg_t ret) {
+int fit_to_win(arg_t a) {
+	int ret;
+
 	if (mode == MODE_NORMAL) {
 		if ((ret = img_fit_win(&img, &win)))
 			img_center(&img, &win);
@@ -547,8 +485,8 @@ int fit_to_win(arg_t ret) {
 	}
 }
 
-int fit_to_img(arg_t ret) {
-	int x, y;
+int fit_to_img(arg_t a) {
+	int ret, x, y;
 	unsigned int w, h;
 
 	if (mode == MODE_NORMAL) {
@@ -565,3 +503,96 @@ int fit_to_img(arg_t ret) {
 		return 0;
 	}
 }
+
+int open_with(arg_t a) {
+	const char *prog = (const char*) a;
+	pid_t pid;
+
+	if (!prog || !*prog)
+		return 0;
+
+	if((pid = fork()) == 0) {
+		execlp(prog, prog,
+		       filenames[mode == MODE_NORMAL ? fileidx : tns.sel], NULL);
+		warn("could not exec: %s", prog);
+		exit(1);
+	} else if (pid < 0) {
+		warn("could not for. program was: %s", prog);
+	}
+	
+	return 0;
+}
+
+int run_command(arg_t a) {
+	const char *cline = (const char*) a;
+	char *cn, *cmdline;
+	const char *co, *fname;
+	int fncnt, fnlen, status;
+	pid_t pid;
+
+	if (!cline || !*cline)
+		return 0;
+
+	/* build command line: */
+	fncnt = 0;
+	co = cline - 1;
+	while ((co = strchr(co + 1, '#')))
+		fncnt++;
+	if (!fncnt)
+		return 0;
+	fname = filenames[mode == MODE_NORMAL ? fileidx : tns.sel];
+	fnlen = strlen(fname);
+	cn = cmdline = (char*) s_malloc((strlen(cline) + fncnt * (fnlen + 2)) *
+	                                sizeof(char));
+	/* replace all '#' with filename: */
+	for (co = cline; *co; co++) {
+		if (*co == '#') {
+			*cn++ = '"';
+			strcpy(cn, fname);
+			cn += fnlen;
+			*cn++ = '"';
+		} else {
+			*cn++ = *co;
+		}
+	}
+	*cn = '\0';
+
+	win_set_cursor(&win, CURSOR_WATCH);
+
+	if ((pid = fork()) == 0) {
+		execl("/bin/sh", "/bin/sh", "-c", cmdline, NULL);
+		warn("could not exec: /bin/sh");
+		exit(1);
+	} else if (pid < 0) {
+		warn("could not fork. command line was: %s", cmdline);
+		goto end;
+	}
+
+	waitpid(pid, &status, 0);
+	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+		warn("child exited with non-zero return value: %d. command line was: %s",
+		     WEXITSTATUS(status), cmdline);
+	
+	if (mode == MODE_NORMAL) {
+		if (fileidx < tns.cnt)
+			tns_load(&tns, fileidx, filenames[fileidx], 1);
+		img_close(&img, 1);
+		load_image(fileidx);
+	} else {
+		if (!tns_load(&tns, tns.sel, filenames[tns.sel], 0)) {
+			remove_file(tns.sel, 0);
+			tns.dirty = 1;
+			if (tns.sel >= tns.cnt)
+				tns.sel = tns.cnt - 1;
+		}
+	}
+
+end:
+	if (mode == MODE_THUMBS)
+		win_set_cursor(&win, CURSOR_ARROW);
+	/* else: cursor is reset in redraw() */
+
+	free(cmdline);
+
+	return 1;
+}
diff --git a/events.h b/events.h
index d2e7c6d..4e60d2a 100644
--- a/events.h
+++ b/events.h
@@ -21,22 +21,18 @@
 
 #include <X11/Xlib.h>
 
-typedef struct {
-	KeySym ksym;
-	Bool reload;
-	const char *cmdline;
-} command_t;
-
-typedef int arg_t;
+typedef void* arg_t;
 
 typedef struct {
+	Bool ctrl;
 	KeySym ksym;
 	int (*handler)(arg_t);
 	arg_t arg;
 } keymap_t;
 
 typedef struct {
-	unsigned int mod;
+	Bool ctrl;
+	Bool shift;
 	unsigned int button;
 	int (*handler)(arg_t);
 	arg_t arg;
@@ -63,5 +59,7 @@ int rotate(arg_t);
 int zoom(arg_t);
 int fit_to_win(arg_t);
 int fit_to_img(arg_t);
+int open_with(arg_t);
+int run_command(arg_t);
 
 #endif /* EVENTS_H */