diff --git a/rtdata/languages/default b/rtdata/languages/default
index cd8255717..cfe9b1372 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -2753,6 +2753,7 @@ TP_LOCALLAB_SOFTRETI_TOOLTIP;Take into account deltaE to improve Transmission ma
 TP_LOCALLAB_SOURCE_GRAY;Value
 TP_LOCALLAB_SPECIAL;Special use of RGB curves
 TP_LOCALLAB_SPECIAL_TOOLTIP;Only for this RGB curve, disabled (or reduce effects) of Scope, mask...for example, if you want to have a negative effect.
+TP_LOCALLAB_SPECCASE; Specific cases
 TP_LOCALLAB_SPOTNAME;Control Spot #
 TP_LOCALLAB_STD;Standard
 TP_LOCALLAB_STR;Strength
diff --git a/rtgui/controlspotpanel.cc b/rtgui/controlspotpanel.cc
index 900c5cd01..83d62f572 100644
--- a/rtgui/controlspotpanel.cc
+++ b/rtgui/controlspotpanel.cc
@@ -86,6 +86,11 @@ ControlSpotPanel::ControlSpotPanel():
     shortc_(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_SHORTC")))),
     savrest_(Gtk::manage(new Gtk::CheckButton(M("TP_LOCALLAB_SAVREST")))),
 
+    expTransGrad_(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_TRANSIT")))),
+    expShapeDetect_(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_ARTIF")))),
+    expSpecCases_(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_SPECCASE")))),
+    expMaskMerge_(Gtk::manage(new MyExpander(false, M("TP_LOCALLAB_MASFRAME")))),
+
     preview_(Gtk::manage(new Gtk::ToggleButton(M("TP_LOCALLAB_PREVIEW")))),
 
     controlPanelListener(nullptr),
@@ -285,11 +290,8 @@ ControlSpotPanel::ControlSpotPanel():
     ctboxqualitymethod->pack_start(*qualityMethod_);
 //    pack_start(*ctboxqualitymethod);
 
-    Gtk::Frame* const transitFrame = Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_TRANSIT")));
-    transitFrame->set_label_align(0.025, 0.5);
-
     if (showtooltip) {
-        transitFrame->set_tooltip_text(M("TP_LOCALLAB_TRANSIT_TOOLTIP"));
+        expTransGrad_->set_tooltip_text(M("TP_LOCALLAB_TRANSIT_TOOLTIP"));
     }
 
     ToolParamBlock* const transitBox = Gtk::manage(new ToolParamBlock());
@@ -323,14 +325,11 @@ ControlSpotPanel::ControlSpotPanel():
     transitBox->pack_start(*transitweak_);
     transitBox->pack_start(*transitgrad_);
     transitBox->pack_start(*feather_);
-    transitFrame->add(*transitBox);
-    pack_start(*transitFrame);
-
-    Gtk::Frame* const artifFrame = Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_ARTIF")));
-    artifFrame->set_label_align(0.025, 0.5);
+    expTransGrad_->add(*transitBox, false);
+    pack_start(*expTransGrad_, false, false);
 
     if (showtooltip) {
-        artifFrame->set_tooltip_text(M("TP_LOCALLAB_ARTIF_TOOLTIP"));
+        expShapeDetect_->set_tooltip_text(M("TP_LOCALLAB_ARTIF_TOOLTIP"));
     }
 
     ToolParamBlock* const artifBox = Gtk::manage(new ToolParamBlock());
@@ -363,12 +362,14 @@ ControlSpotPanel::ControlSpotPanel():
     artifBox->pack_start(*colorde_);
     artifBox->pack_start(*preview_);
     artifBox->pack_start(*colorscope_);
-    artifFrame->add(*artifBox);
-    pack_start(*artifFrame);
+    expShapeDetect_->add(*artifBox, false);
+    pack_start(*expShapeDetect_, false, false);
+
+    ToolParamBlock* const specCaseBox = Gtk::manage(new ToolParamBlock());
 
     avoidConn_  = avoid_->signal_toggled().connect(
                       sigc::mem_fun(*this, &ControlSpotPanel::avoidChanged));
-    pack_start(*avoid_);
+    specCaseBox->pack_start(*avoid_);
 
     blwhConn_  = blwh_->signal_toggled().connect(
                      sigc::mem_fun(*this, &ControlSpotPanel::blwhChanged));
@@ -377,7 +378,7 @@ ControlSpotPanel::ControlSpotPanel():
         blwh_->set_tooltip_text(M("TP_LOCALLAB_BLWH_TOOLTIP"));
     }
 
-    pack_start(*blwh_);
+    specCaseBox->pack_start(*blwh_);
 
     recursConn_  = recurs_->signal_toggled().connect(
                        sigc::mem_fun(*this, &ControlSpotPanel::recursChanged));
@@ -387,13 +388,12 @@ ControlSpotPanel::ControlSpotPanel():
         avoid_->set_tooltip_text(M("TP_LABCURVE_AVOIDCOLORSHIFT_TOOLTIP"));
     }
 
-    pack_start(*recurs_);
-
-    Gtk::Frame* const maskFrame = Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_MASFRAME")));
-    maskFrame->set_label_align(0.025, 0.5);
+    specCaseBox->pack_start(*recurs_);
+    expSpecCases_->add(*specCaseBox, false);
+    pack_start(*expSpecCases_, false, false);
 
     if (showtooltip) {
-        maskFrame->set_tooltip_text(M("TP_LOCALLAB_MASFRAME_TOOLTIP"));
+        expMaskMerge_->set_tooltip_text(M("TP_LOCALLAB_MASFRAME_TOOLTIP"));
     }
 
     ToolParamBlock* const maskBox = Gtk::manage(new ToolParamBlock());
@@ -424,8 +424,8 @@ ControlSpotPanel::ControlSpotPanel():
     // maskBox->pack_start(*shortc_);
     maskBox->pack_start(*lumask_);
     // maskBox->pack_start(*savrest_);
-    maskFrame->add(*maskBox);
-    pack_start(*maskFrame);
+    expMaskMerge_->add(*maskBox, false);
+    pack_start(*expMaskMerge_, false, false);
 
     Gtk::HSeparator *separatormet = Gtk::manage(new  Gtk::HSeparator());
     pack_start(*separatormet, Gtk::PACK_SHRINK, 2);
@@ -1583,6 +1583,14 @@ void ControlSpotPanel::setParamEditable(bool cond)
     wavMethod_->set_sensitive(cond);
 }
 
+void ControlSpotPanel::setDefaultExpanderVisibility()
+{
+    expTransGrad_->set_expanded(false);
+    expShapeDetect_->set_expanded(false);
+    expSpecCases_->set_expanded(false);
+    expMaskMerge_->set_expanded(false);
+}
+
 void ControlSpotPanel::addControlSpotCurve(Gtk::TreeModel::Row& row)
 {
     // printf("addControlSpotCurve\n");
diff --git a/rtgui/controlspotpanel.h b/rtgui/controlspotpanel.h
index ebd94e603..f2bfa1fd0 100644
--- a/rtgui/controlspotpanel.h
+++ b/rtgui/controlspotpanel.h
@@ -205,6 +205,10 @@ public:
      * @param cond Condition to enable interactions
      */
     void setParamEditable(bool cond);
+    /**
+     * Reset expander collapse state to default one
+     */
+    void setDefaultExpanderVisibility();
 
     // Batch mode management
     // Note: Batch mode is deactivated for Locallab
@@ -396,6 +400,11 @@ private:
     Gtk::CheckButton* const savrest_;
     sigc::connection savrestConn_;
 
+    MyExpander* const expTransGrad_;
+    MyExpander* const expShapeDetect_;
+    MyExpander* const expSpecCases_;
+    MyExpander* const expMaskMerge_;
+
     Gtk::ToggleButton* const preview_;
     sigc::connection previewConn_;
 
diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index a3e725870..a4351c710 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -1097,6 +1097,9 @@ void Locallab::foldAllButOne(LocallabTool* except)
 
 void Locallab::openAllTools()
 {
+    // Set default visibility for settings panel sub-expanders
+    expsettings->setDefaultExpanderVisibility();
+
     for (auto tool : locallabTools) {
         tool->setExpanded(true);