diff --git a/rtdata/languages/default b/rtdata/languages/default
index f783845ca..7ded1c447 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -354,6 +354,7 @@ HISTORY_MSG_162;Tone Mapping
 HISTORY_MSG_163;RGB Curves - R
 HISTORY_MSG_164;RGB Curves - G
 HISTORY_MSG_165;RGB Curves - B
+HISTORY_MSG_166;Neutral levels
 HISTORY_NEWSNAPSHOTAS;As...
 HISTORY_NEWSNAPSHOT;Add
 HISTORY_NEWSSDIALOGLABEL;Label of the snapshot:
@@ -835,9 +836,11 @@ TP_EQUALIZER_LARGEST;coarsest
 TP_EQUALIZER_NEUTRAL;Neutral
 TP_EXPOSCORR_LABEL;Raw white-black point
 TP_EXPOSURE_AUTOLEVELS;Auto Levels
+TP_EXPOSURE_AUTOLEVELS_TIP;Toggle execution of Auto Levels to automatically set parameter values based on image analysis  
 TP_EXPOSURE_BLACKLEVEL;Black
 TP_EXPOSURE_BRIGHTNESS;Brightness
 TP_EXPOSURE_CLIP;Clip
+TP_EXPOSURE_CLIP_TIP;The fraction of pixels to be clipped in auto levels operation
 TP_EXPOSURE_COMPRHIGHLIGHTSTHRESHOLD;Highlight recovery threshold
 TP_EXPOSURE_COMPRHIGHLIGHTS;Highlight recovery amount
 TP_EXPOSURE_COMPRSHADOWS;Shadow recovery
@@ -917,6 +920,8 @@ TP_LENSGEOM_LABEL;Lens / Geometry
 TP_LUMADENOISE_EDGETOLERANCE;Edge Tolerance
 TP_LUMADENOISE_LABEL;Luminance Noise Reduction
 TP_LUMADENOISE_RADIUS;Radius
+TP_NEUTRAL;Neutral
+TP_NEUTRAL_TIP;Reset exposure controls to neutral values
 TP_PERSPECTIVE_HORIZONTAL;Horizontal
 TP_PERSPECTIVE_LABEL;Perspective
 TP_PERSPECTIVE_VERTICAL;Vertical
diff --git a/rtengine/procevents.h b/rtengine/procevents.h
index d3d1bae11..353215f3e 100644
--- a/rtengine/procevents.h
+++ b/rtengine/procevents.h
@@ -187,7 +187,8 @@ enum ProcEvent {
 	EvRGBrCurve=162,
 	EvRGBgCurve=163,
 	EvRGBbCurve=164,
-	NUMOFEVENTS=165
+	EvNeutralExp=165,
+	NUMOFEVENTS=166
 };
 }    
 #endif    
diff --git a/rtengine/refreshmap.cc b/rtengine/refreshmap.cc
index 9a747daf9..42858e9da 100644
--- a/rtengine/refreshmap.cc
+++ b/rtengine/refreshmap.cc
@@ -184,7 +184,8 @@ SHARPENING,       // EvEPDReweightingIterates
 SHARPENING,       // EvEPDEnabled
 RGBCURVE,         // EvRGBrCurve
 RGBCURVE,         // EvRGBgCurve
-RGBCURVE          // EvRGBbCurve
+RGBCURVE,         // EvRGBbCurve
+RGBCURVE          // EvNeutralExp
 	
 };
 
diff --git a/rtgui/tonecurve.cc b/rtgui/tonecurve.cc
index 86e0d4234..c35b34767 100644
--- a/rtgui/tonecurve.cc
+++ b/rtgui/tonecurve.cc
@@ -32,6 +32,7 @@ ToneCurve::ToneCurve () : Gtk::VBox(), FoldableToolPanel(this) {
   abox->set_border_width (2);
 
   autolevels = Gtk::manage (new Gtk::ToggleButton (M("TP_EXPOSURE_AUTOLEVELS")));
+  autolevels->set_tooltip_markup (M("TP_EXPOSURE_AUTOLEVELS_TIP"));
   autoconn = autolevels->signal_toggled().connect( sigc::mem_fun(*this, &ToneCurve::autolevels_toggled) );
 
   sclip = Gtk::manage (new MySpinButton ());
@@ -39,9 +40,18 @@ ToneCurve::ToneCurve () : Gtk::VBox(), FoldableToolPanel(this) {
   sclip->set_increments (0.001, 0.01);
   sclip->set_value (0.002);
   sclip->set_digits (4);
+  sclip->set_tooltip_text (M("TP_EXPOSURE_CLIP_TIP"));
   sclip->signal_value_changed().connect( sigc::mem_fun(*this, &ToneCurve::clip_changed) );
 
+  neutral = Gtk::manage (new Gtk::Button (M("TP_NEUTRAL")));
+  neutral->set_tooltip_text (M("TP_NEUTRAL_TIP"));
+  neutralconn = neutral->signal_pressed().connect( sigc::mem_fun(*this, &ToneCurve::neutral_pressed) );
+  neutral->show();
+
   abox->pack_start (*autolevels);
+  // pack_end is used for these controls as autolevels is replaceable using pack_start in batchmode
+  abox->pack_end (*neutral);
+  abox->pack_end (*Gtk::manage (new Gtk::Label (" "))); //spacer
   abox->pack_end (*sclip);
   abox->pack_end (*Gtk::manage (new Gtk::Label (M("TP_EXPOSURE_CLIP"))));
   pack_start (*abox);
@@ -242,6 +252,35 @@ void ToneCurve::adjusterChanged (Adjuster* a, double newval) {
         listener->panelChanged (EvSHCompr, costr);
 }
 
+void ToneCurve::neutral_pressed () {
+// This method deselects auto levels 
+// and sets neutral values to params in exposure panel
+
+    if (batchMode) {
+        autolevels->set_inconsistent (false);
+        autoconn.block (true);
+        autolevels->set_active (false);
+        autoconn.block (false);
+
+        lastAuto = autolevels->get_active ();
+    }
+    else { //!batchMode
+        autolevels->set_active (false);
+        autolevels->set_inconsistent (false);
+    }
+    
+    expcomp->setValue(0);
+    hlcompr->setValue(0);
+    hlcomprthresh->setValue(0);
+    brightness->setValue(0);
+    black->setValue(0);
+    shcompr->setValue(0);
+    if (!black->getAddMode()) shcompr->set_sensitive(!((int)black->getValue ()==0)); //at black=0 shcompr value has no effect
+    contrast->setValue(0);
+    //saturation->setValue(0);
+    
+    listener->panelChanged (EvNeutralExp, M("GENERAL_ENABLED"));
+}
 void ToneCurve::autolevels_toggled () {
 
     if (batchMode) {
@@ -370,6 +409,7 @@ void ToneCurve::setBatchMode (bool batchMode) {
 
     removeIfThere (abox, autolevels, false);
     autolevels = Gtk::manage (new Gtk::CheckButton (M("TP_EXPOSURE_AUTOLEVELS")));
+    autolevels->set_tooltip_markup (M("TP_EXPOSURE_AUTOLEVELS_TIP"));
     autoconn = autolevels->signal_toggled().connect( sigc::mem_fun(*this, &ToneCurve::autolevels_toggled) );
     abox->pack_start (*autolevels);
 
diff --git a/rtgui/tonecurve.h b/rtgui/tonecurve.h
index 768cbbf64..cc93e2c6c 100644
--- a/rtgui/tonecurve.h
+++ b/rtgui/tonecurve.h
@@ -33,6 +33,7 @@ class ToneCurve : public Gtk::VBox, public AdjusterListener, public FoldableTool
     Gtk::HBox* abox;
     Gtk::ToggleButton* autolevels;
     MySpinButton* sclip;
+    Gtk::Button* neutral;
     Adjuster* expcomp;
     Adjuster* brightness;
     Adjuster* black;
@@ -43,7 +44,7 @@ class ToneCurve : public Gtk::VBox, public AdjusterListener, public FoldableTool
 	Adjuster* saturation;
 
     bool clipDirty, lastAuto;
-    sigc::connection autoconn;
+    sigc::connection autoconn, neutralconn;
     CurveEditorGroup* curveEditorG;
     DiagonalCurveEditor* shape;
 
@@ -68,6 +69,7 @@ class ToneCurve : public Gtk::VBox, public AdjusterListener, public FoldableTool
 
 
     void adjusterChanged (Adjuster* a, double newval);
+    void neutral_pressed ();
     void autolevels_toggled ();
     void clip_changed ();
     bool clip_changed_ ();