diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index 233a5e708..487938b01 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -1115,6 +1115,9 @@ void Locallab::openAllTools()
 {
     for (auto tool : locallabTools) {
         tool->setExpanded(true);
+
+        // Set default visibility for tool sub-expanders
+        tool->setDefaultExpanderVisibility();
     }
 }
 
diff --git a/rtgui/locallabtools.cc b/rtgui/locallabtools.cc
index fe909a01d..0b0822328 100644
--- a/rtgui/locallabtools.cc
+++ b/rtgui/locallabtools.cc
@@ -340,6 +340,7 @@ LocallabColor::LocallabColor():
     strcolab(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADSTRCHRO"), -6., 6., 0.05, 0.))),
     strcolh(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADSTRHUE"), -6., 6., 0.05, 0.))),
     angcol(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADANG"), -180, 180, 0.1, 0.))),
+    expcurvcol(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_EXPCURV")))),
     labqualcurv(Gtk::manage(new Gtk::Label(M("TP_LOCALLAB_QUALCURV_METHOD") + ":"))),
     qualitycurveMethod(Gtk::manage(new MyComboBoxText())),
     llCurveEditorG(new CurveEditorGroup(options.lastlocalCurvesDir, M("TP_LOCALLAB_LUM"))),
@@ -366,6 +367,7 @@ LocallabColor::LocallabColor():
     gridmerFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_LABGRIDMERG")))),
     labgridmerg(Gtk::manage(new LabGrid(EvLocallabLabGridmergValue, M("TP_LOCALLAB_LABGRID_VALUES"), false))),
     merlucol(Gtk::manage(new Adjuster(M("TP_LOCALLAB_MERLUCOL"), 0.0, 100.0, 0.5, 32., Gtk::manage(new RTImage("circle-black-small.png")), Gtk::manage(new RTImage("circle-white-small.png"))))),
+    expmaskcol(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_SHOWC")))),
     showmaskcolMethod(Gtk::manage(new MyComboBoxText())),
     showmaskcolMethodinv(Gtk::manage(new MyComboBoxText())),
     enaColorMask(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_ENABLE_MASK")))),
@@ -471,6 +473,8 @@ LocallabColor::LocallabColor():
         angcol->set_tooltip_text(M("TP_LOCALLAB_GRADANG_TOOLTIP"));
     }
 
+    setExpandAlignProperties(expcurvcol, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
+
     qualitycurveMethod->append(M("TP_LOCALLAB_CURVNONE"));
     qualitycurveMethod->append(M("TP_LOCALLAB_CURVCURR"));
     qualitycurveMethod->set_active(0);
@@ -629,6 +633,12 @@ LocallabColor::LocallabColor():
 
     merlucol->setAdjusterListener(this);
 
+    setExpandAlignProperties(expmaskcol, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
+
+    if (showtooltip) {
+        expmaskcol->set_tooltip_markup(M("TP_LOCALLAB_MASK_TOOLTIP"));
+    }
+
     showmaskcolMethod->append(M("TP_LOCALLAB_SHOWMNONE"));
     showmaskcolMethod->append(M("TP_LOCALLAB_SHOWMODIF"));
     showmaskcolMethod->append(M("TP_LOCALLAB_SHOWMODIFMASK"));
@@ -791,8 +801,6 @@ LocallabColor::LocallabColor():
     }
 
     pack_start(*invers);
-    MyExpander* const expcurvcol = Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_EXPCURV")));
-    setExpandAlignProperties(expcurvcol, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
     ToolParamBlock* const gradcolBox = Gtk::manage(new ToolParamBlock());
     gradcolBox->pack_start(*strcol);
 
@@ -854,13 +862,6 @@ LocallabColor::LocallabColor():
         pack_start(*expmaskcol1, false, false);
     }
 
-    MyExpander* const expmaskcol = Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_SHOWC")));
-    setExpandAlignProperties(expmaskcol, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
-
-    if (showtooltip) {
-        expmaskcol->set_tooltip_markup(M("TP_LOCALLAB_MASK_TOOLTIP"));
-    }
-
     Gtk::Frame* const mergecolFrame = Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_MERGECOLFRA")));
     mergecolFrame->set_label_align(0.025, 0.5);
     ToolParamBlock* const maskcolBox = Gtk::manage(new ToolParamBlock());
@@ -971,6 +972,14 @@ void LocallabColor::getMaskView(int &colorMask, int &colorMaskinv, int &expMask,
     colorMaskinv = showmaskcolMethodinv->get_active_row_number();
 }
 
+void LocallabColor::setDefaultExpanderVisibility()
+{
+    expgradcol->set_expanded(false);
+    expcurvcol->set_expanded(false);
+    expmaskcol1->set_expanded(false);
+    expmaskcol->set_expanded(false);
+}
+
 void LocallabColor::disableListener()
 {
     LocallabTool::disableListener();
@@ -2479,6 +2488,13 @@ void LocallabExposure::getMaskView(int &colorMask, int &colorMaskinv, int &expMa
     expMaskinv = showmaskexpMethodinv->get_active_row_number();
 }
 
+void LocallabExposure::setDefaultExpanderVisibility()
+{
+    exptoolexp->set_expanded(false);
+    expgradexp->set_expanded(false);
+    expmaskexp->set_expanded(false);
+}
+
 void LocallabExposure::disableListener()
 {
     LocallabTool::disableListener();
@@ -3542,6 +3558,12 @@ void LocallabShadow::getMaskView(int &colorMask, int &colorMaskinv, int &expMask
     shMaskinv = showmaskSHMethodinv->get_active_row_number();
 }
 
+void LocallabShadow::setDefaultExpanderVisibility()
+{
+    expgradsh->set_expanded(false);
+    expmasksh->set_expanded(false);
+}
+
 void LocallabShadow::disableListener()
 {
     LocallabTool::disableListener();
@@ -4378,6 +4400,12 @@ void LocallabVibrance::getMaskView(int &colorMask, int &colorMaskinv, int &expMa
     vibMask = showmaskvibMethod->get_active_row_number();
 }
 
+void LocallabVibrance::setDefaultExpanderVisibility()
+{
+    expgradvib->set_expanded(false);
+    expmaskvib->set_expanded(false);
+}
+
 void LocallabVibrance::disableListener()
 {
     LocallabTool::disableListener();
@@ -5130,6 +5158,7 @@ LocallabBlur::LocallabBlur():
     LocallabTool(this, M("TP_LOCALLAB_BLUR_TOOLNAME"), M("TP_LOCALLAB_BLUFR"), true),
 
     // Blur, Noise & Denoise specific widgets
+    expblnoise(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_BLNOI_EXP")))),
     blMethod(Gtk::manage(new MyComboBoxText())),
     fftwbl(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_FFTWBLUR")))),
     radius(Gtk::manage(new Adjuster(M("TP_LOCALLAB_RADIUS"), MINRAD, MAXRAD, 0.1, 1.5, nullptr, nullptr, &blurSlider2radius, &blurRadius2Slider))),
@@ -5147,6 +5176,7 @@ LocallabBlur::LocallabBlur():
     blurMethod(Gtk::manage(new MyComboBoxText())),
     chroMethod(Gtk::manage(new MyComboBoxText())),
     activlum(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_ACTIV")))),
+    expdenoise(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_DENOI_EXP")))),
     LocalcurveEditorwavden(new CurveEditorGroup(options.lastlocalCurvesDir, M("TP_LOCALLAB_WAVDEN"))),
     wavshapeden(static_cast<FlatCurveEditor*>(LocalcurveEditorwavden->addCurve(CT_Flat, "", nullptr, false, false))),
     noiselumf0(Gtk::manage(new Adjuster(M("TP_LOCALLAB_NOISELUMFINEZERO"), MINCHRO, MAXCHRO, 0.01, 0.))),
@@ -5191,7 +5221,11 @@ LocallabBlur::LocallabBlur():
     const int complexsoft = options.complexity;
 
     // Parameter Blur, Noise & Denoise specific widgets
+    setExpandAlignProperties(expblnoise, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
 
+    if (showtooltip) {
+        expblnoise->set_tooltip_markup(M("TP_LOCALLAB_BLUMETHOD_TOOLTIP"));
+    }
 
     blMethod->append(M("TP_LOCALLAB_BLUR"));
     blMethod->append(M("TP_LOCALLAB_BLMED"));
@@ -5258,6 +5292,12 @@ LocallabBlur::LocallabBlur():
 
     activlumConn = activlum->signal_toggled().connect(sigc::mem_fun(*this, &LocallabBlur::activlumChanged));
 
+    setExpandAlignProperties(expdenoise, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
+
+    if (showtooltip) {
+        expdenoise->set_tooltip_markup(M("TP_LOCALLAB_DENOI_TOOLTIP"));
+    }
+
     LocalcurveEditorwavden->setCurveListener(this);
 
     wavshapeden->setIdentityValue(0.);
@@ -5412,14 +5452,6 @@ LocallabBlur::LocallabBlur():
     csThresholdblur->setAdjusterListener(this);
 
     // Add Blur, Noise & Denoise specific widgets to GUI
-    MyExpander* const expblnoise = Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_BLNOI_EXP")));
-    setExpandAlignProperties(expblnoise, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
-
-    if (showtooltip) {
-        expblnoise->set_tooltip_markup(M("TP_LOCALLAB_BLUMETHOD_TOOLTIP"));
-    }
-
-    expblnoise->set_expanded(false);
     ToolParamBlock* const blnoisebox = Gtk::manage(new ToolParamBlock());
     blnoisebox->pack_start(*blMethod);
 
@@ -5446,14 +5478,6 @@ LocallabBlur::LocallabBlur():
     // blnoisebox->pack_start(*activlum);
     expblnoise->add(*blnoisebox, false);
     pack_start(*expblnoise);
-    MyExpander* const expdenoise = Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_DENOI_EXP")));
-    setExpandAlignProperties(expdenoise, true, false, Gtk::ALIGN_FILL, Gtk::ALIGN_START);
-
-    if (showtooltip) {
-        expdenoise->set_tooltip_markup(M("TP_LOCALLAB_DENOI_TOOLTIP"));
-    }
-
-    expdenoise->set_expanded(false);
     ToolParamBlock* const denoisebox = Gtk::manage(new ToolParamBlock());
     Gtk::Frame* const wavFrame = Gtk::manage(new Gtk::Frame());
     ToolParamBlock* const wavBox = Gtk::manage(new ToolParamBlock());
@@ -5478,9 +5502,9 @@ LocallabBlur::LocallabBlur():
     ToolParamBlock* const maskblBox = Gtk::manage(new ToolParamBlock());
     maskblBox->pack_start(*showmaskblMethod, Gtk::PACK_SHRINK, 4);
     maskblBox->pack_start(*enablMask, Gtk::PACK_SHRINK, 0);
+    maskblBox->pack_start(*maskblCurveEditorG, Gtk::PACK_SHRINK, 4); // Padding is mandatory to correct behavior of curve editor
 
     if (complexsoft < 2) {
-        maskblBox->pack_start(*maskblCurveEditorG, Gtk::PACK_SHRINK, 4); // Padding is mandatory to correct behavior of curve editor
         maskblBox->pack_start(*strumaskbl, Gtk::PACK_SHRINK, 0);
         maskblBox->pack_start(*toolbl, Gtk::PACK_SHRINK, 0);
     }
@@ -5536,6 +5560,13 @@ void LocallabBlur::getMaskView(int &colorMask, int &colorMaskinv, int &expMask,
     blMask = showmaskblMethod->get_active_row_number();
 }
 
+void LocallabBlur::setDefaultExpanderVisibility()
+{
+    expblnoise->set_expanded(false);
+    expdenoise->set_expanded(false);
+    expmaskbl->set_expanded(false);
+}
+
 void LocallabBlur::disableListener()
 {
     LocallabTool::disableListener();
diff --git a/rtgui/locallabtools.h b/rtgui/locallabtools.h
index d7e54403d..e884d4238 100644
--- a/rtgui/locallabtools.h
+++ b/rtgui/locallabtools.h
@@ -107,7 +107,7 @@ public:
     bool isLocallabToolAdded();
 
     // Mask background management function
-    void refChanged(const double huer, const double lumar, const double chromar); // Make it virtual
+    void refChanged(const double huer, const double lumar, const double chromar);
 
     // Mask preview functions
     virtual void resetMaskView() {};
@@ -122,13 +122,14 @@ public:
     void colorForValue(double valX, double valY, enum ColorCaller::ElemType elemType, int callerId, ColorCaller* caller);
 
     // To be implemented
+    virtual void setDefaultExpanderVisibility() {};
     virtual void disableListener();
     virtual void enableListener();
     virtual void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr) {};
     virtual void write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited = nullptr) {};
     virtual void setDefaults(const rtengine::procparams::ProcParams* defParams, const ParamsEdited* pedited = nullptr) {};
-    virtual void adjusterChanged(Adjuster* a, double newval) {};  // At least when using mask
-    virtual void curveChanged(CurveEditor* ce) {}; // At least when using curve
+    virtual void adjusterChanged(Adjuster* a, double newval) {};
+    virtual void curveChanged(CurveEditor* ce) {};
 
 protected:
     // To be implemented
@@ -171,6 +172,7 @@ private:
     Adjuster* const strcolab;
     Adjuster* const strcolh;
     Adjuster* const angcol;
+    MyExpander* const expcurvcol;
     Gtk::Label* const labqualcurv;
     MyComboBoxText* const qualitycurveMethod;
     CurveEditorGroup* const llCurveEditorG;
@@ -197,6 +199,7 @@ private:
     Gtk::Frame* const gridmerFrame;
     LabGrid* const labgridmerg;
     Adjuster* const merlucol;
+    MyExpander* const expmaskcol;
     MyComboBoxText* const showmaskcolMethod;
     MyComboBoxText* const showmaskcolMethodinv;
     Gtk::CheckButton* const enaColorMask;
@@ -233,8 +236,9 @@ public:
     void setListener(ToolPanelListener* tpl);
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -338,8 +342,9 @@ public:
     ~LocallabExposure();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -417,8 +422,9 @@ public:
     ~LocallabShadow();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -489,8 +495,9 @@ public:
     ~LocallabVibrance();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -539,7 +546,7 @@ public:
     LocallabSoft();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
     void disableListener();
     void enableListener();
@@ -565,6 +572,7 @@ class LocallabBlur:
 {
 private:
     // Blur & Noise specific widgets
+    MyExpander* const expblnoise;
     MyComboBoxText* const blMethod;
     Gtk::CheckButton* const fftwbl;
     Adjuster* const radius;
@@ -582,6 +590,7 @@ private:
     MyComboBoxText* const blurMethod;
     MyComboBoxText* const chroMethod;
     Gtk::CheckButton* const activlum;
+    MyExpander* const expdenoise;
     CurveEditorGroup* const LocalcurveEditorwavden;
     FlatCurveEditor* const wavshapeden;
     Adjuster* const noiselumf0;
@@ -627,8 +636,9 @@ public:
     ~LocallabBlur();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -701,8 +711,9 @@ public:
     ~LocallabTone();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -788,8 +799,9 @@ public:
     void updateMinMax(const double cdma, const double cdmin, const double mini, const double maxi, const double Tmean, const double Tsigma, const double Tmin, const double Tmax);
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -841,7 +853,7 @@ public:
     LocallabSharp();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
     void disableListener();
     void enableListener();
@@ -954,8 +966,9 @@ public:
     ~LocallabContrast();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
@@ -1040,8 +1053,9 @@ public:
     ~LocallabCBDL();
 
     void resetMaskView();
-    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask);
+    void getMaskView(int &colorMask, int &colorMaskinv, int &expMask, int &expMaskinv, int &shMask, int &shMaskinv, int &vibMask, int &softMask, int &blMask, int &tmMask, int &retiMask, int &sharMask, int &lcMask, int &cbMask) override;
 
+    void setDefaultExpanderVisibility();
     void disableListener();
     void enableListener();
     void read(const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = nullptr);
diff --git a/rtgui/locallabtools2.cc b/rtgui/locallabtools2.cc
index a8d01f9a7..ac67990c8 100644
--- a/rtgui/locallabtools2.cc
+++ b/rtgui/locallabtools2.cc
@@ -337,6 +337,11 @@ void LocallabTone::getMaskView(int &colorMask, int &colorMaskinv, int &expMask,
     tmMask = showmasktmMethod->get_active_row_number();
 }
 
+void LocallabTone::setDefaultExpanderVisibility()
+{
+    expmasktm->set_expanded(false);
+}
+
 void LocallabTone::disableListener()
 {
     LocallabTool::disableListener();
@@ -1103,6 +1108,12 @@ void LocallabRetinex::getMaskView(int &colorMask, int &colorMaskinv, int &expMas
     retiMask = showmaskretiMethod->get_active_row_number();
 }
 
+void LocallabRetinex::setDefaultExpanderVisibility()
+{
+    expretitools->set_expanded(false);
+    expmaskreti->set_expanded(false);
+}
+
 void LocallabRetinex::disableListener()
 {
     LocallabTool::disableListener();
@@ -2501,6 +2512,13 @@ void LocallabContrast::getMaskView(int &colorMask, int &colorMaskinv, int &expMa
     lcMask = showmasklcMethod->get_active_row_number();
 }
 
+void LocallabContrast::setDefaultExpanderVisibility()
+{
+    expcontrastpyr->set_expanded(false);
+    expcontrastpyr2->set_expanded(false);
+    expmasklc->set_expanded(false);
+}
+
 void LocallabContrast::disableListener()
 {
     LocallabTool::disableListener();
@@ -3758,6 +3776,12 @@ void LocallabCBDL::getMaskView(int &colorMask, int &colorMaskinv, int &expMask,
     cbMask = showmaskcbMethod->get_active_row_number();
 }
 
+void LocallabCBDL::setDefaultExpanderVisibility()
+{
+    printf("Test: %d\n", expmaskcb->is_visible());
+    expmaskcb->set_expanded(false);
+}
+
 void LocallabCBDL::disableListener()
 {
     LocallabTool::disableListener();