diff --git a/include/ui.h b/include/ui.h
index 531d72e..d78d5dd 100644
--- a/include/ui.h
+++ b/include/ui.h
@@ -30,6 +30,8 @@
 
 extern float rotation_angles[N_AXIS];
 
+extern GtkWidget *gl_area;
+
 G_BEGIN_DECLS
 
 #define GEM_GRAPH_CLIENT_TYPE_WINDOW (gem_graph_client_window_get_type())
@@ -156,8 +158,8 @@ void on_close_window(GtkWidget *widget);
 
 void ui_set_stack(const char *mode);
 
-void ui_send_notification(const char *message);
+void ui_setup_glarea(GtkGLArea *target, GtkBox *target_controls);
 void ui_send_internal_notification(const char *message);
 void ui_close_internal_notification(void);
 void ui_toggle_sidebar();
-void ui_setup_glarea();
+
diff --git a/src/ui/events.c b/src/ui/events.c
index bd0e358..f9f7838 100644
--- a/src/ui/events.c
+++ b/src/ui/events.c
@@ -25,6 +25,7 @@
 #include <stdio.h>
 
 #include "../../include/base.h"
+#include "../../include/graphics.h"
 #include "../../include/ui.h"
 
 void on_about_action(GSimpleAction *action,
diff --git a/src/ui/gemgraph.ui b/src/ui/gemgraph.ui
index 93bbd17..e37fbb9 100644
--- a/src/ui/gemgraph.ui
+++ b/src/ui/gemgraph.ui
@@ -137,10 +137,16 @@
                   <object class="GtkStackPage">
                     <property name="name">presentation</property>
                     <property name="child">
-                      <object class="GtkLabel">
-                        <property name="halign">center</property>
-                        <property name="label" translatable="yes">&lt;b&gt;Main zone: presentation mode&lt;/b&gt;</property>
-                        <property name="use-markup">True</property>
+                      <object class="GtkBox">
+                        <property name="orientation">vertical</property>
+                        <child>
+                          <object class="GtkGlArea" id="presentation_glarea">
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkBox" id="presentation_controls">
+                          </object>
+                        </child>
                       </object>
                     </property>
                   </object>
@@ -149,10 +155,16 @@
                   <object class="GtkStackPage">
                     <property name="name">edition</property>
                     <property name="child">
-                      <object class="GtkLabel">
-                        <property name="halign">center</property>
-                        <property name="label" translatable="yes">&lt;b&gt;Main zone: edition mode&lt;/b&gt;</property>
-                        <property name="use-markup">True</property>
+                      <object class="GtkBox">
+                        <property name="orientation">vertical</property>
+                        <child>
+                          <object class="GtkGlArea" id="edition_glarea">
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkBox" id="edition_controls">
+                          </object>
+                        </child>
                       </object>
                     </property>
                   </object>
diff --git a/src/ui/window.c b/src/ui/window.c
index e874ac8..fef3a55 100644
--- a/src/ui/window.c
+++ b/src/ui/window.c
@@ -27,14 +27,13 @@
 #include <glib-2.0/glib.h>
 
 #include "../../include/base.h"
-#include "../../include/graphics.h"
 #include "../../include/ui.h"
 
 /* -------------------------------------------------------------------------- */
 
 float rotation_angles[N_AXIS] = { 0.0 }; // Rotation angles on each axis
 
-static GtkWidget *gl_area = NULL;
+GtkWidget *gl_area = NULL;
 
 static GemGraphClientWindow *window;
 
@@ -122,7 +121,7 @@ static void gem_graph_client_window_init(GemGraphClientWindow *self)
     ui_toggle_sidebar();
 
     // Setup GLArea
-    ui_setup_glarea();
+    ui_setup_glarea(window->run_glarea, window->run_controls);
 }
 
 /* -------------------------------------------------------------------------- */
@@ -242,13 +241,13 @@ static inline GtkWidget *create_axis_slider(int axis)
     return box;
 }
 
-void ui_setup_glarea()
+void ui_setup_glarea(GtkGLArea *target, GtkBox *target_controls)
 {
     int i, minor=4, major=0;
-    GtkWidget * controls;
+    GtkWidget *controls;
 
-    gl_area = GTK_WIDGET(window->run_glarea);
-    controls = GTK_WIDGET(window->run_controls);
+    gl_area = GTK_WIDGET(target);
+    controls = GTK_WIDGET(target_controls);
     gtk_widget_set_hexpand(gl_area, TRUE);
     gtk_widget_set_vexpand(gl_area, TRUE);
     gtk_widget_set_halign(gl_area, GTK_ALIGN_CENTER);
@@ -270,7 +269,7 @@ void ui_setup_glarea()
     for(i = 0; i < N_AXIS; i++)
         gtk_box_append(GTK_BOX(controls), create_axis_slider(i));
 
-    gtk_gl_area_set_auto_render(window->run_glarea, true);
+    gtk_gl_area_set_auto_render(target, true);
 
     gtk_widget_show(GTK_WIDGET(gl_area));
     gtk_gl_area_set_required_version( GTK_GL_AREA(gl_area), minor, major);