diff --git a/bin/curvecalc b/bin/curvecalc
--- a/bin/curvecalc
+++ b/bin/curvecalc
@@ -178,6 +178,9 @@ class Main(object):
         if dialog.run() == 1:
             self.curveset.new_curve(entry.get_text())
         dialog.hide()
+
+    def onRedrawCurves(self, *args):
+        dispatcher.send("all curves rebuild")
         
     def onSubtermsMap(self, *args):
         # if this was called too soon, like in __init__, the gtktable
diff --git a/light9/curvecalc/curvecalc.glade b/light9/curvecalc/curvecalc.glade
--- a/light9/curvecalc/curvecalc.glade
+++ b/light9/curvecalc/curvecalc.glade
@@ -207,6 +207,16 @@
                         <property name="use_underline">True</property>
                       </object>
                     </child>
+                    <child>
+                      <object class="GtkMenuItem" id="menuitem17">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="use_action_appearance">False</property>
+                        <property name="label" translatable="yes">Redraw curves</property>
+                        <property name="use_underline">True</property>
+                        <signal name="activate" handler="onRedrawCurves" swapped="no"/>
+                      </object>
+                    </child>
                   </object>
                 </child>
               </object>