diff --git a/data/image/bar graph vertical.png b/data/image/bar graph vertical.png
new file mode 100644
index 0000000..59f7a1f
Binary files /dev/null and b/data/image/bar graph vertical.png differ
diff --git a/data/image/many bars graph horizontal.png b/data/image/many bars graph horizontal.png
new file mode 100644
index 0000000..381500a
Binary files /dev/null and b/data/image/many bars graph horizontal.png differ
diff --git a/data/image/many bars graph vertical.png b/data/image/many bars graph vertical.png
new file mode 100644
index 0000000..381500a
Binary files /dev/null and b/data/image/many bars graph vertical.png differ
diff --git a/data/image/many bars vertical.png b/data/image/many bars vertical.png
new file mode 100644
index 0000000..188674e
Binary files /dev/null and b/data/image/many bars vertical.png differ
diff --git a/src/widget/data/dispatch.c b/src/widget/data/dispatch.c
index a6c6126..ebbf50a 100644
--- a/src/widget/data/dispatch.c
+++ b/src/widget/data/dispatch.c
@@ -31,6 +31,9 @@
 #include "../../../include/signal.h"
 #include "../../../include/widget.h"
 
+// "graph", "chart" and "diagram" are ambiguous terms, sometimes used interchangeably.
+// https://www.mathsisfun.com/data/data-graph.php
+
 #define PARTITION_A 700
 #define PARTITION_B 700
 
diff --git a/src/widget/rules/tree_tools/compare.c b/src/widget/rules/tree_tools/compare.c
index fd604cf..c7d6ea0 100644
--- a/src/widget/rules/tree_tools/compare.c
+++ b/src/widget/rules/tree_tools/compare.c
@@ -184,7 +184,7 @@ void *widget_get_an_impression_of_what_a_rules_comparator_could_be(){
 
     GtkBox *comparator = GTK_BOX (gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2));
     gtk_box_append (comparator, GTK_WIDGET (compare_left));
-    gtk_box_append (comparator, GTK_WIDGET (compare_right));
+//    gtk_box_append (comparator, GTK_WIDGET (compare_right));
 
     return comparator;
 }
diff --git a/src/widget/rules/tree_tools/pilot_box.c b/src/widget/rules/tree_tools/pilot_box.c
index 0ad0192..fcd6fd6 100644
--- a/src/widget/rules/tree_tools/pilot_box.c
+++ b/src/widget/rules/tree_tools/pilot_box.c
@@ -51,8 +51,11 @@ void *widget_get_rules_tree_tools ()
 {
     GtkBox *rules_tree_box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0));
     gtk_box_append (rules_tree_box, GTK_WIDGET (widget_get_user_rules_tree()));
+    gtk_box_append (rules_tree_box, GTK_WIDGET (gtk_picture_new_for_filename
+        ("/home/jean/Gem-Graph/gem-graph-client/data/image/many bars vertical.png")));
     gtk_box_append (rules_tree_box, GTK_WIDGET (widget_get_rules_use ()));
     gtk_box_append (rules_tree_box, GTK_WIDGET (widget_get_an_impression_of_what_a_rules_comparator_could_be()));
+    gtk_widget_set_size_request (GTK_WIDGET (rules_tree_box), W_IMAGE_LOCAL * 7.4, 0);//H_IMAGE_LOCAL);
     return GTK_WIDGET (rules_tree_box);
 }
 
diff --git a/src/widget/rules/tree_tools/usage.c b/src/widget/rules/tree_tools/usage.c
index 94e02a2..d8fbf69 100644
--- a/src/widget/rules/tree_tools/usage.c
+++ b/src/widget/rules/tree_tools/usage.c
@@ -43,7 +43,7 @@ void *widget_get_rules_use ()
 
 //    GtkWidget *frame_rules_use = gtk_frame_new ("  Rules use");
 //    gtk_frame_set_child (GTK_FRAME (frame_rules_use), GTK_WIDGET (scroll_rules_use));
-    gtk_widget_set_size_request (GTK_WIDGET (scroll_rules_use), W_IMAGE_LOCAL * 2, 0);//H_IMAGE_LOCAL);
+    gtk_widget_set_size_request (GTK_WIDGET (scroll_rules_use), W_IMAGE_LOCAL * 1.5, 0);//H_IMAGE_LOCAL);
     gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scroll_rules_use), GTK_WIDGET (rules_use_box));