diff --git a/2024-04-30.png b/2024-04-30.png
deleted file mode 100644
index ff01e7c..0000000
Binary files a/2024-04-30.png and /dev/null differ
diff --git a/2024-05-01.png b/2024-05-01.png
deleted file mode 100644
index 5c73332..0000000
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diff --git a/E coli by David S. Goodsell (2009).png b/E coli by David S. Goodsell (2009).png
new file mode 100644
index 0000000..55b14b8
Binary files /dev/null and b/E coli by David S. Goodsell (2009).png differ
diff --git a/cold.c b/cold.c
index c94470d..3d8a0b1 100644
--- a/cold.c
+++ b/cold.c
@@ -16,6 +16,41 @@ GtkWidget *get_objects_and_situations_horizontal_pane(){
   return objects_and_situations_horizontal_pane;
 }
 
+GtkWidget *get_a_space_test_image(){
+  GtkWidget *image;
+  image = GTK_WIDGET(get_scrolled_gl_area());
+  image = gtk_picture_new_for_filename ("/home/jean/01/Gtk4/images/aXoris.png");
+  image = gtk_picture_new_for_filename ("/home/jean/01/Gtk4/images/gg sketch.png");
+  image = gtk_picture_new_for_filename ("/home/jean/01/Gtk4/images/E coli.png");
+  image = gtk_picture_new_for_filename ("/home/jean/01/Gtk4/images/E coli resized.png");
+  image = gtk_picture_new_for_filename ("/home/jean/01/Gtk4/Getting_Started_with_GTK/E coli by David S. Goodsell (2009).png");
+  return image;
+}
+
+GtkWidget *get_scroll_speed(){
+  GtkAdjustment *speed_adjust = gtk_adjustment_new (0, 0, 100, 1, 0, 0);
+  GtkWidget *scroll_speed = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, speed_adjust);
+  return scroll_speed;
+}
+
+GtkBox *get_XYZ_gtk_box(){
+  GtkBox *XYZ_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2)); // spacing = 2
+  //  GtkWidget *scale_X = gtk_scale_button_new (0, 360, 10, NULL);  <  à étudier
+  //                    (double min, double max, double step, const char** icons)
+  GtkAdjustment *X_adjust = gtk_adjustment_new (0, 0, 380, 1, 0, 0);
+  GtkAdjustment *Y_adjust = gtk_adjustment_new (0, 0, 380, 1, 0, 0);
+  GtkAdjustment *Z_adjust = gtk_adjustment_new (0, 0, 380, 1, 0, 0);
+  GtkWidget *scroll_X = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, X_adjust);
+  GtkWidget *scroll_Y = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, Y_adjust);
+  GtkWidget *scroll_Z = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, Z_adjust);
+
+  gtk_box_append (XYZ_box, scroll_X);
+  gtk_box_append (XYZ_box, scroll_Y);
+  gtk_box_append (XYZ_box, scroll_Z);
+
+  return XYZ_box;
+}
+
 GtkProgressBar *get_simulation_time_extent_buffer(){
   GtkProgressBar *buffer = GTK_PROGRESS_BAR (gtk_progress_bar_new ());
   gtk_progress_bar_set_text (buffer, "<---  [buffer]  (simulation extent time)  --->");
@@ -23,19 +58,28 @@ GtkProgressBar *get_simulation_time_extent_buffer(){
   return buffer;
 }
 
+
 GtkScrolledWindow *get_scrolled_gl_area(){
   GtkScrolledWindow *scrolled = GTK_SCROLLED_WINDOW(gtk_scrolled_window_new());
   gtk_scrolled_window_set_min_content_width  (scrolled, W_GL_AREA);
   gtk_scrolled_window_set_min_content_height (scrolled, H_GL_AREA);
 //  GtkAdjustment *width  = gtk_adjustment_new (600, 300, 1000, 1, 1, 1000);
 //  GtkAdjustment *height = gtk_adjustment_new (600, 300, 1000, 1, 1, 1000);
-  //  (value, lower, upper, step_increment, page_increment, page_size)
-  GtkWidget *GLarea = gtk_gl_area_new();
-  gtk_scrolled_window_set_child (scrolled, GLarea);
+    //      (value, lower, upper, step_increment, page_increment, page_size)
+//  GtkWidget *GLarea = gtk_gl_area_new();
+//  gtk_scrolled_window_set_child (scrolled, GLarea);
 //  https://docs.gtk.org/gtk4/class.GLArea.html
   return scrolled;
 }
 
+
+
+
+
+/*---------------------------------------------------------------------------*/
+
+
+
 GtkWidget *get_measures_page_new(){
   GtkWidget *measures_grid = gtk_grid_new();
   gtk_grid_attach (GTK_GRID  (measures_grid), gtk_button_new_with_label ("movements"), 0, 0, 1, 1);
@@ -94,6 +138,8 @@ void window_bar(GtkWindow *window, char *title){
   GtkWidget *titlebar = gtk_header_bar_new();
   gtk_window_set_title (window, title);
   gtk_window_set_titlebar (window, titlebar);   //   header_bar
+//  GtkWidget my_window_controls = *gtk_window_controls_new (GTK_PACK_END); //  _START
+//  gtk_window_controls_set_decoration_layout (GTK_WINDOW_CONTROLS(my_window_controls), NULL); //  const char* layout);
 }
 
 void activate (GtkApplication *app, gpointer user_data) {
diff --git a/cold.h b/cold.h
index 1d3c02c..3866aec 100644
--- a/cold.h
+++ b/cold.h
@@ -7,7 +7,10 @@
 #define H_STYLES_PANE 60
 
 void print_text(GtkWidget *widget, gpointer data);
+GtkWidget *get_a_space_test_image();
 GtkScrolledWindow *get_scrolled_gl_area();
+GtkBox *get_XYZ_gtk_box();
+GtkWidget *get_scroll_speed();
 void window_bar(GtkWindow *window, char *title);
 GtkWidget *get_objects_and_situations_horizontal_pane();
 GtkProgressBar *get_simulation_time_extent_buffer();
diff --git a/cold.o b/cold.o
index a19c604..0c7a30d 100644
Binary files a/cold.o and b/cold.o differ
diff --git a/hot.c b/hot.c
index 973a20d..c51ff52 100644
--- a/hot.c
+++ b/hot.c
@@ -8,6 +8,20 @@
 //  https://docs.gtk.org/gtk4/visual_index.html  <  widgets gallery
 
 GtkWidget *get_space_page_new(){
+
+  GtkWidget *space_grid = gtk_grid_new();
+
+  gtk_grid_attach (GTK_GRID (space_grid), get_objects_and_situations_horizontal_pane(), 0, 0, 1, 1);
+  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_a_space_test_image()), 0, 1, 1, 10);
+  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("RUN"), 1, 0, 1, 1);
+  gtk_grid_attach (GTK_GRID(space_grid), get_scroll_speed(), 1, 1, 1, 1);
+  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("Step"), 1, 2, 1, 1);
+//  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_simulation_time_extent_buffer()), 0, 2, 1, 1);
+  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_XYZ_gtk_box()), 1, 3, 1, 1);
+  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("zoom"), 1, 4, 1, 1);
+
+  return space_grid;
+}
   /*
   GtkBox *controls_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
   gtk_box_append (controls_box, gtk_button_new_with_label ("RUN"));
@@ -23,8 +37,6 @@ GtkWidget *get_space_page_new(){
   gtk_progress_bar_set_text (buffer, "<---  [buffer]  (simulation extent time)  --->");
   gtk_progress_bar_set_show_text (buffer, TRUE);
 //  gtk_box_append (controls_box, GTK_WIDGET(buffer));//gtk_button_new_with_label ("---- buffer ----"));
-*/
-
 
 
   GtkBox *XYZ_box = GTK_BOX(gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2)); // spacing = 2
@@ -40,7 +52,7 @@ GtkWidget *get_space_page_new(){
   gtk_box_append (XYZ_box, scroll_X);
   gtk_box_append (XYZ_box, scroll_Y);
   gtk_box_append (XYZ_box, scroll_Z);
-/*
+
   GtkWidget *bottom_grid = gtk_grid_new();
 //  gtk_grid_attach (GTK_GRID(bottom_grid), GTK_WIDGET(controls_box), 0, 0, 1, 1);
   gtk_grid_attach (GTK_GRID(bottom_grid), gtk_button_new_with_label ("Objects / Situations     (transparences, styles)"), 0, 1, 1, 1);
@@ -55,19 +67,5 @@ GtkWidget *get_space_page_new(){
   gtk_paned_set_start_child (GTK_PANED(objects_and_situations_horizontal_pane), GTK_WIDGET (frame_objects));
   gtk_paned_set_end_child (GTK_PANED(objects_and_situations_horizontal_pane), GTK_WIDGET (frame_situations));
 */
-  GtkWidget *space_grid = gtk_grid_new();
-  gtk_grid_attach (GTK_GRID (space_grid), get_objects_and_situations_horizontal_pane(), 0, 0, 1, 1);
-  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_scrolled_gl_area()), 0, 1, 1, 10);
-  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("RUN"), 1, 0, 1, 1);
-  GtkAdjustment *speed_adjust = gtk_adjustment_new (0, 0, 100, 1, 0, 0);
-  GtkWidget *scroll_speed = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, speed_adjust);
-  gtk_grid_attach (GTK_GRID(space_grid), scroll_speed, 1, 1, 1, 1);
-  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("Step"), 1, 2, 1, 1);
-  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_simulation_time_extent_buffer()), 0, 2, 1, 1);
-  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(XYZ_box), 1, 3, 1, 1);
-  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("zoom"), 1, 4, 1, 1);
 
-  return space_grid;
-
-}
 
diff --git a/hot.o b/hot.o
index 88bea5a..c9dfed1 100644
Binary files a/hot.o and b/hot.o differ
diff --git a/main.o b/main.o
index b364a66..e7ebb20 100644
Binary files a/main.o and b/main.o differ
diff --git a/myprogram b/myprogram
index dc6dc4d..06288f3 100755
Binary files a/myprogram and b/myprogram differ
diff --git a/warm.c b/warm.c
index 13e9083..c700774 100644
--- a/warm.c
+++ b/warm.c
@@ -38,7 +38,7 @@ GtkWidget *get_space_page_new_2024_04_30 (){
   gtk_grid_attach (GTK_GRID(bottom_grid), gtk_button_new_with_label ("zoom, +/- grid,\npresentation,\nstyles,..."), 1, 0, 1, 2);
 
   GtkWidget *space_grid = gtk_grid_new();
-  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_scrolled_gl_area()), 0, 0, 1, 1);
+  gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(get_a_space_test_image()), 0, 0, 1, 1);
   gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(XYZ_box),     1, 0, 1, 1);
   gtk_grid_attach (GTK_GRID(space_grid), GTK_WIDGET(bottom_grid), 0, 1, 2, 1); // ?! échec x_size
 //  gtk_grid_attach (GTK_GRID(space_grid), gtk_button_new_with_label ("?"), 1, 1, 1, 1);
diff --git a/warm.o b/warm.o
index 2584186..360a7fe 100644
Binary files a/warm.o and b/warm.o differ