diff --git a/Fltk/FlGui.cpp b/Fltk/FlGui.cpp
index 8e92bd367cd7c55bf796e9a1ec0a84f2da71b779..f093a227aca9280ff934caa5d84d4719ffda751d 100644
--- a/Fltk/FlGui.cpp
+++ b/Fltk/FlGui.cpp
@@ -96,9 +96,9 @@ FlGui::FlGui(int argc, char **argv)
   //Fl::set_color(FL_SELECTION_COLOR, 50, 50, 0);
 #endif
 
-  // add new box types used in graphic window
-  Fl::set_boxtype(GMSH_SIMPLE_RIGHT_BOX, simple_right_box_draw, 1, 1, 2, 2);
-  Fl::set_boxtype(GMSH_SIMPLE_TOP_BOX, simple_top_box_draw, 1, 1, 2, 2);
+  // add new box types used in graphic window (dx dy dw dh)
+  Fl::set_boxtype(GMSH_SIMPLE_RIGHT_BOX, simple_right_box_draw, 0, 0, 1, 0);
+  Fl::set_boxtype(GMSH_SIMPLE_TOP_BOX, simple_top_box_draw, 0, 1, 0, 0);
 
   // add global shortcuts
   Fl::add_handler(globalShortcut);
diff --git a/Fltk/clippingWindow.cpp b/Fltk/clippingWindow.cpp
index 98a7e5f5ae3447a1b961ad5644cceafd9c39ce47..346cac95392f6f918c14cf921ae37c7536f4accd 100644
--- a/Fltk/clippingWindow.cpp
+++ b/Fltk/clippingWindow.cpp
@@ -197,7 +197,7 @@ clippingWindow::clippingWindow(int deltaFontSize)
 
   browser = new Fl_Multi_Browser(0, 0, L, height);
   browser->callback(clip_update_cb);
-  browser->box(FL_FLAT_BOX);
+  browser->box(GMSH_SIMPLE_RIGHT_BOX);
 
   Fl_Tabs *o = new Fl_Tabs
     (L + WB, WB, width - L - 2 * WB, height - 3 * WB - 4 * BH);
diff --git a/Fltk/onelabGroup.cpp b/Fltk/onelabGroup.cpp
index a22bd02534a3596c80cd9e7ffd2e95f42b10bc09..bf175911d0a01f614a7297fed490bf0454d17c86 100644
--- a/Fltk/onelabGroup.cpp
+++ b/Fltk/onelabGroup.cpp
@@ -782,11 +782,14 @@ onelabGroup::onelabGroup(int x, int y, int w, int h, const char *l)
   _tree->color(col);
   _tree->callback(onelab_tree_cb);
   _tree->connectorstyle(FL_TREE_CONNECTOR_SOLID);
-  //_tree->connectorstyle(FL_TREE_CONNECTOR_NONE);
+  // _tree->marginleft(0);
+  // _tree->usericonmarginleft(0);
+  // _tree->labelmarginleft(0);
+  // _tree->connectorwidth(15);
   _tree->showroot(0);
   _tree->box(FL_FLAT_BOX);
   _tree->scrollbar_size(std::max(10, FL_NORMAL_SIZE - 2));
-  //_tree->resizable(0);
+  // _tree->resizable(0);
   _tree->end();
 
   _computeWidths();
diff --git a/Fltk/optionWindow.cpp b/Fltk/optionWindow.cpp
index 916448db5a67b1ff53535e818ff0975471b806ad..b21eef003bb9b99fc4b91156ae912899168462d7 100644
--- a/Fltk/optionWindow.cpp
+++ b/Fltk/optionWindow.cpp
@@ -1294,7 +1294,7 @@ optionWindow::optionWindow(int deltaFontSize)
 
   // Selection browser
   browser = new Fl_Hold_Browser(0, 0, L, height);
-  browser->box(FL_FLAT_BOX);
+  browser->box(GMSH_SIMPLE_RIGHT_BOX);
   browser->has_scrollbar(Fl_Browser_::VERTICAL);
   browser->add("General");
   browser->add("Geometry");
diff --git a/Fltk/pluginWindow.cpp b/Fltk/pluginWindow.cpp
index 14996aef484f6e9ce424c9a2bb1965186f9b1172..83c2b0d9733bb0f73ad23f620ac2bd820d593d1f 100644
--- a/Fltk/pluginWindow.cpp
+++ b/Fltk/pluginWindow.cpp
@@ -312,13 +312,13 @@ pluginWindow::pluginWindow(int deltaFontSize)
 
   browser = new Fl_Hold_Browser(0, 0, L1, height);
   browser->callback(plugin_browser_cb);
-  browser->box(FL_FLAT_BOX);
+  browser->box(GMSH_SIMPLE_RIGHT_BOX);
   browser->has_scrollbar(Fl_Browser_::VERTICAL);
 
-  view_browser = new Fl_Multi_Browser(L1 + 1, 0, L2 - 1, height);
+  view_browser = new Fl_Multi_Browser(L1, 0, L2, height);
   view_browser->has_scrollbar(Fl_Browser_::VERTICAL);
   view_browser->callback(plugin_browser_cb);
-  view_browser->box(FL_FLAT_BOX);
+  view_browser->box(GMSH_SIMPLE_RIGHT_BOX);
 
   for(std::map<std::string, GMSH_Plugin*>::iterator it = PluginManager::
         instance()->begin(); it != PluginManager::instance()->end(); ++it) {