diff --git a/include/fsm.h b/include/fsm.h
index 0162016..a78bbd2 100644
--- a/include/fsm.h
+++ b/include/fsm.h
@@ -56,7 +56,6 @@ void fsm_set_exec_edit (int value);
 void fsm_set_state_rules_data (int value);
 void fsm_set_store_restore_reset (int target, int value);
 
-void fsm_reset_all_situations_transparencies_at_value (int value); // provisoire...
 
 bool fsm_get_preferences_state ();
 void fsm_set_preferences_state (bool value);
diff --git a/include/prefer.h b/include/prefer.h
index b9125aa..21c81df 100644
--- a/include/prefer.h
+++ b/include/prefer.h
@@ -34,3 +34,7 @@
 
 void pref_set_store_restore_reset (int choice, int value);
 const char get_button_icon_name (int n);
+
+void fsm_reset_all_situations_transparencies_at_value (int value); // provisoire...
+
+void *prefer_add_measure (char *measure_name);
diff --git a/src/fsm.c b/src/fsm.c
index 2e01c4c..b2e958d 100644
--- a/src/fsm.c
+++ b/src/fsm.c
@@ -75,23 +75,6 @@ void fsm_set_state_rules_data (int choice)
 }
 
 
-//  -------------------------   O B J E C T S   ------------------------------//
-//                      >>  transferred to prefer.c
-
-
-//  ----------------------   S I T U A T I O N S   ---------------------------//
-
-static int reset_situations_to_value = -1;
-
-void fsm_reset_all_situations_transparencies_at_value (int value)
-{
-    debug_printing (reset_situations_to_value, value, 3);
-            // SITUATIONS_box_RESTORE_VALUES is sub_automaton 3
-    reset_situations_to_value = value;
-    widget_reset_all_situations_transparencies_to_value (value);
-    preferences_have_been_modified = TRUE;
-}
-
 
 /******************************************************************************/
 /*                             D E B U G G E R S                              */
@@ -116,8 +99,8 @@ static void debug_printing (int choice, int value, int sub_automaton)
            tab_0 [choice_EXEC_EDIT],
            tab_1 [choice]);
     break;
-    case (2) :  printf("fsm_set_store_restore_reset   >>   prefer.c\n");    break;
-    case (3) :  printf("fsm_reset_all_situations_transparencies_at_value : %3d\n", value); break;
+    case (2) :  break;
+    case (3) :  break;
 
     default : printf("default in automaton.debug_printing()\n");
     }
@@ -126,6 +109,15 @@ static void debug_printing (int choice, int value, int sub_automaton)
 
 
 /******************************************************************************/
-/*             N O N   E X C L U S I V E   S E L E C T I O N S                */
+/*                N O N   E X C L U S I V E   S E L E C T I O N S             */
 /******************************************************************************/
 //                                    ?
+
+
+
+/******************************************************************************/
+/*                               M E A S U R E S                              */
+/******************************************************************************/
+
+
+
diff --git a/src/prefer.c b/src/prefer.c
index eea4e17..bab564c 100644
--- a/src/prefer.c
+++ b/src/prefer.c
@@ -58,6 +58,7 @@ static const char *icon_name [3] = {
 //  transtypage vers un pointeur depuis un entier de taille différente   vvv  TODO
 const char *get_button_icon_name (int n) {return (const char*) icon_name [n];}
 
+//  -------------------------   O B J E C T S   ------------------------------//
 
 struct preferences { int transparency [n_objects]; };   //  may become a long, long list...
 struct preferences *pref_jean = NULL;  // TODO  (voir graphics_init(...))
@@ -69,19 +70,19 @@ void pref_set_store_restore_reset (int choice, int value)
 {
     switch (choice) {
     case (STORE) :
-        printf("STORE    (value = %d)\n", value);
+        printf("Objects transparencies  STORE    (value = %3d)   (see prefer.c)\n", value);
         for (int i = 0; i < n_objects; i++) {
           p [i] = widget_get_object_transparency (i);
           widget_set_object_transparency_to_value (i, p [i]);
         }
     break;
     case (RESTORE) :
-        printf("RESTORE  (value = %d)\n", value);
+        printf("Objects transparencies  RESTORE  (value = %3d)   (see prefer.c)\n", value);
         for (int i = 0; i < n_objects; i++)
             widget_set_object_transparency_to_value (i, p [i]);
     break;
     case (RESET) :
-        printf("RESET    (value = %d)\n", value);
+        printf("Objects transparencies  RESET    (value = %3d)   (see prefer.c)\n", value);
         for (int i = 0; i < n_objects; i++)
             widget_set_object_transparency_to_value (i, value); // i * 4  // rand() % 127
     break;
@@ -91,3 +92,30 @@ void pref_set_store_restore_reset (int choice, int value)
     fsm_set_preferences_state (TRUE);
 }
 
+
+
+
+//  ----------------------   S I T U A T I O N S   ---------------------------//
+
+static int reset_situations_to_value = -1;
+
+void fsm_reset_all_situations_transparencies_at_value (int value)
+{
+    printf("reset_all_situations_transparencies_at_value %3d   (see prefer.c)\n", value);
+    reset_situations_to_value = value;
+    widget_reset_all_situations_transparencies_to_value (value);
+}
+
+
+
+/******************************************************************************/
+/*                               M E A S U R E S                              */
+/******************************************************************************/
+
+static void *list_measures;
+
+void *prefer_add_measure (char *measure_name)
+{
+    printf("prefer_add_measure  %p   <<<   %s   (see prefer.c)\n", list_measures, measure_name);
+    return NULL;
+}
diff --git a/src/widget/measure/dispatch.c b/src/widget/measure/dispatch.c
index 0afa622..9dca7e4 100644
--- a/src/widget/measure/dispatch.c
+++ b/src/widget/measure/dispatch.c
@@ -31,6 +31,7 @@
 #include "../../../include/base.h"
 #include "../../../include/signal.h"
 #include "../../../include/widget.h"
+#include "../../../include/prefer.h"
 
 
 /******************************************************************************/
@@ -54,8 +55,29 @@ static GtkWidget *balance;
 static GtkWidget *btt_select_first_of_two;
 static GtkWidget *btt_select_second_of_two;
 
-void *widget_measure_do_depends_on_a_single_event() {printf("measure depends on a single event\n"); return measure_page;}
-void *widget_measure_do_depends_on_two_events() {printf("measure depends on two events\n"); return measure_page;}
+// Measure concerns
+//  - nb of occurences of the rule
+//  - nb of objects / situations  before / after  >  select target
+//  - time (date) of event
+//  - time elapsed between two events
+//  - occurence of events C between events A and B
+
+// Then, add this new measure to the list of measures
+
+// Is this measure to be correlated to some others ?
+
+void *widget_measure_do_depends_on_a_single_event()
+{
+    printf("measure depends on a single event\n");
+    prefer_add_measure ("new measure from a single event");
+    return measure_page;
+}
+void *widget_measure_do_depends_on_two_events()
+{
+    printf("measure depends on two events\n");
+    prefer_add_measure ("new measure from two events");
+    return measure_page;
+}
 
 void *widget_measure_do_depends_on_one_or_two_events()
 {