diff --git a/tools/Makefile b/tools/Makefile
index 53b2985..ef8c091 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -2,6 +2,8 @@
 #	makefile for floatimg tools
 #	use with caution
 #
+#	PLEASE ! update to the 'Global.makefile' concept !
+#
 
 COPT = -Wall -fpic -g -DDEBUG_LEVEL=0 -lm
 DEPS = ../floatimg.h  ../libfloatimg.a Makefile
diff --git a/tools/fimgfx.c b/tools/fimgfx.c
index 92817fb..ef1af3e 100644
--- a/tools/fimgfx.c
+++ b/tools/fimgfx.c
@@ -31,13 +31,13 @@ Fx fx_list[] = {
 	{ "pow2",		Fx_pow2,	0,	1 },
 	{ "sqrt",		Fx_sqrt,	0,	1 },
 	{ "gray0",		Fx_gray0,	0,	1 },
-	{ "halfsz0",		Fx_halfsz0,	0,	1 },
-	{ "rot90",		Fx_rot90,	0,	0 },
+//	{ "halfsz0",		Fx_halfsz0,	0,	1 },
+//	{ "rot90",		Fx_rot90,	0,	0 },
 	{ "cmixa",		Fx_cmixa,	0,	1 },
 	{ "xper",		Fx_xper,	0,	1 },
 	{ "desat",		Fx_desat,	0,	1 },
 	{ "ctr2x2",		Fx_ctr2x2,	0,	1 },
-	{ "norm",		Fx_norm,	0,	1 },
+//	{ "norm",		Fx_norm,	0,	1 },
 	{ "classtrial",		Fx_classtrial,	0,	1 },
 	{ "binarize",		Fx_binarize,	0,	1 },
 	{ "trinarize",		Fx_trinarize,	0,	1 },
@@ -45,6 +45,14 @@ Fx fx_list[] = {
 	{ NULL,			0,		0,	0 }
 	};
 
+/* --------------------------------------------------------------------- */
+static void list_of_effects(void)
+{
+Fx		*fx;
+for (fx=fx_list; fx->name; fx++) {
+	printf("%s\n", fx->name);
+	}
+}
 /* --------------------------------------------------------------------- */
 int lookup_fxidx(char *txt)
 {
@@ -105,6 +113,7 @@ puts("\tfimgfx [options] <effect> source.fimg resultat.fimg");
 
 puts("options:");
 puts("\t-k N.N\tset the floating value");
+puts("\t-l\tlist effects");
 puts("\t-v\tincrease verbosity");
 
 puts("effects:"); 
@@ -217,9 +226,11 @@ switch (action) {
 
 	}
 
+// foo = fimg_export_picture(&dest, dstfname, 0);
 foo = fimg_dump_to_file(&dest, dstfname, 0);
 if (foo) {
-	fprintf(stderr, "dumping datas to file give us a %d\n", foo);
+	fprintf(stderr, "dumping datas to file '%s' give us a %d\n",
+						dstfname,	foo);
 	return foo;
 	}
 
@@ -240,10 +251,11 @@ char		*operator;
 char		*srcname = "";
 char		*dstname = "out.fimg";
 
-while ((opt = getopt(argc, argv, "hk:v")) != -1) {
+while ((opt = getopt(argc, argv, "hk:lv")) != -1) {
 	switch(opt) {
 		case 'h':	help(0);			break;
 		case 'k':	global_fvalue = atof(optarg);	break;
+		case 'l':	list_of_effects();	exit(0);
 		case 'v':	verbosity++;			break;
 		}
 	}
diff --git a/tools/fx_demo.sh b/tools/fx_demo.sh
new file mode 100755
index 0000000..dc56b40
--- /dev/null
+++ b/tools/fx_demo.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+SRC="in.fimg"
+K="0.414"
+TMP="/tmp/foo.fimg"
+
+for fx in $(./fimgfx -l)
+do
+
+	printf "==========   %-12s =========\n" $fx
+
+	outfile=$(printf "/tmp/fx_%s.png" $fx)
+	echo $outfile
+
+	rm $TMP
+	./fimgfx -v -k $K $fx $SRC $TMP
+	if [ $? \!= 0 ] ; then
+		echo error $?
+		exit 1
+	fi
+
+	./fimg2png -v $TMP $outfile
+
+	echo ; sleep 1
+
+done