diff --git a/resources/ui_layout/Readme.md b/resources/ui_layout/Readme.md
index 08cf5e82808..3a720315e10 100644
--- a/resources/ui_layout/Readme.md
+++ b/resources/ui_layout/Readme.md
@@ -25,7 +25,7 @@ each parameter is separated by ':'
 * Page: 
 	page[:idx]:STR:STR
 	* first STR is for the label and the second for the icon, with or without the .svg / .png
-	* idx : append the index of the page (for extruder ui) to the name
+	* idx: append the index of the page (for extruder ui) to the name
 * Group: 
 	group[:nolabel][:title_width$INT][:label_width$INT][:sidetext_width$INT][:EVENT][:id$INT][:idx]:STR
 	* EVENT can be extruders_count_event if the group contains extruders_count and is a printer tab ; silent_mode_event if the group contains silent_mode and is a printer tab ; material_density_event if the group contains material_density.
@@ -35,21 +35,22 @@ each parameter is separated by ':'
 	* EVENT can be extruders_count_event (TabPrinter only), silent_mode_event (TabPrinter only), material_density_event.
 	* nolabel is used to remove the left column, where labels are draw.
 * Line:
-	line:STR
+	line:STR*
 * setting:
 	setting[label$STR][label_width$INT][:full_label][:full_width][:sidetext$STR][sidetext_width$INT][:simple|advanced|expert][:width$INT][:height$INT][:id$INT]:STR
 	* STR, the last parameter: the id name of the setting.
-	* label$STR : to override the label by this new one (if it ends with '_' it won't have a ':' ; if empty it won't have a length).
-	* label_width$INT: change the width of the label. Only works if it's in a line. Override the group one. 0 for auto.
+	* label$STR: to override the label by this new one (if it ends with '_' it won't have a ':' ; if empty it won't have a length).
+	* label_width$INT: change the width of the label. Only works if it's in a line. Override the group one. -1 for auto.
 	* full_label: to override the label by the "full one".
 	* full_width: to tell to create a field that span the full width.
 	* sidetext$STR: the suffix at the right of the widget (like 'mm').
-	* sidetext_width$INT: the suffix label length (override the group one). -& for auto.
+	* sidetext_width$INT: the suffix label length (override the group one). -1 for auto.
 	* simple|advanced|expert: add one of these to modify the mode in which this setting appear.
 	* width$INT: change the width of the field. Shouod work on most type of settings.
 	* height$INT: change the height of the field. Don't works with every type of setting.
-	* id $INT : for setting only a single value of a setting array.
-	* idx : for setting only a single value of a setting array, with the index of the page (for extruder ui page)
+	* url$STR: the url to call when clicking on it.
+	* id $INT: for setting only a single value of a setting array.
+	* idx: for setting only a single value of a setting array, with the index of the page (for extruder ui page)
 * recommended_thin_wall_thickness_description: create a text widget to explain recommended thin wall thickness (only in a fff print tab).
 * parent_preset_description: create a text widget to explain parent preset.
 * cooling_description: create a text widget to explain cooling (only in a filament tab).
diff --git a/src/slic3r/GUI/ConfigManipulation.cpp b/src/slic3r/GUI/ConfigManipulation.cpp
index 8b668502c93..48f9c6a5631 100644
--- a/src/slic3r/GUI/ConfigManipulation.cpp
+++ b/src/slic3r/GUI/ConfigManipulation.cpp
@@ -372,6 +372,9 @@ void ConfigManipulation::toggle_print_fff_options(DynamicPrintConfig* config)
     for (auto el : { "thin_walls_min_width", "thin_walls_overlap" })
         toggle_field(el, config->opt_bool("thin_walls"));
 
+    for (auto el : { "seam_angle_cost", "seam_travel_cost" })
+        toggle_field(el, config->option<ConfigOptionEnum<SeamPosition>>("seam_position")->value == SeamPosition::spNearest);
+
     toggle_field("perimeter_loop_seam", config->opt_bool("perimeter_loop"));
 
     toggle_field("gap_fill_min_area", config->opt_bool("gap_fill"));
diff --git a/src/slic3r/GUI/GUI.cpp b/src/slic3r/GUI/GUI.cpp
index e61e8781af3..f1a3ba9873c 100644
--- a/src/slic3r/GUI/GUI.cpp
+++ b/src/slic3r/GUI/GUI.cpp
@@ -191,7 +191,8 @@ void change_opt_value(DynamicPrintConfig& config, const t_config_option_key& opt
 				config.set_key_value(opt_key, new ConfigOptionEnum<GCodeFlavor>(boost::any_cast<GCodeFlavor>(value)));
 			else if (opt_key.compare("host_type") == 0)
 				config.set_key_value(opt_key, new ConfigOptionEnum<PrintHostType>(boost::any_cast<PrintHostType>(value)));
-			else if (opt_key.compare("infill_connection") == 0)
+			else if (opt_key =="infill_connection" || opt_key =="infill_connection_solid"
+					|| opt_key =="infill_connection_top" || opt_key =="infill_connection_bottom")
 				config.set_key_value(opt_key, new ConfigOptionEnum<InfillConnection>(boost::any_cast<InfillConnection>(value)));
 			else if (opt_key.compare("infill_dense_algo") == 0)
 				config.set_key_value(opt_key, new ConfigOptionEnum<DenseInfillAlgo>(boost::any_cast<DenseInfillAlgo>(value)));
diff --git a/src/slic3r/GUI/OG_CustomCtrl.cpp b/src/slic3r/GUI/OG_CustomCtrl.cpp
index 30e58a4c989..da728f255f9 100644
--- a/src/slic3r/GUI/OG_CustomCtrl.cpp
+++ b/src/slic3r/GUI/OG_CustomCtrl.cpp
@@ -150,6 +150,9 @@ wxPoint OG_CustomCtrl::get_pos(const Line& line, Field* field_in/* = nullptr*/)
                 break;
             }
 
+            //round it to next m_em_unit
+            h_pos += (h_pos % m_em_unit == 0) ? 0 : m_em_unit - (h_pos % m_em_unit);
+
             // If we have a single option with no sidetext
             const std::vector<Option>& option_set = line.get_options();
             if (option_set.size() == 1 && option_set.front().opt.sidetext.size() == 0 &&
@@ -180,7 +183,7 @@ wxPoint OG_CustomCtrl::get_pos(const Line& line, Field* field_in/* = nullptr*/)
                     if (!no_dots)
                         label += ":";
 
-                    if (!label.empty()) {
+                    if (!label.empty() || option.label_width > 0) {
                         wxCoord label_w, label_h;
 #ifdef __WXMSW__
                         // when we use 2 monitors with different DPIs, GetTextExtent() return value for the primary display
@@ -221,7 +224,12 @@ wxPoint OG_CustomCtrl::get_pos(const Line& line, Field* field_in/* = nullptr*/)
 #endif //__WXMSW__
                         h_pos += m_h_gap;
                     }
-                }                
+                }
+
+                //round it to next m_em_unit
+                h_pos += (h_pos % m_em_unit == 0) ? 0 : m_em_unit - (h_pos % m_em_unit);
+
+                // size of little widget before the real one
                 h_pos += 2 * blinking_button_width;
                 
                 if (field == field_in)
@@ -236,7 +244,7 @@ wxPoint OG_CustomCtrl::get_pos(const Line& line, Field* field_in/* = nullptr*/)
                         }
                     }
                 } else
-                    h_pos += field->getWindow()->GetSize().x;
+                    h_pos += field->getWindow()->GetSize().x + m_h_gap;
 
                 if (option_set.size() == 1 && option_set.front().opt.full_width)
                     break;
@@ -557,6 +565,9 @@ void OG_CustomCtrl::CtrlLine::render(wxDC& dc, wxCoord v_pos)
         return;
     }
 
+    //round it to next m_em_unit
+    h_pos += (h_pos % ctrl->m_em_unit == 0) ? 0 : ctrl->m_em_unit - (h_pos % ctrl->m_em_unit);
+
     // If we're here, we have more than one option or a single option with sidetext
     // so we need a horizontal sizer to arrange these things
 
@@ -589,7 +600,7 @@ void OG_CustomCtrl::CtrlLine::render(wxDC& dc, wxCoord v_pos)
             bool no_dots = label.empty() || option.label.back() == '_';
             if (!no_dots)
                 label += ":";
-            if (!label.empty()) {
+            if (!label.empty() || option.label_width > 0) {
                 int width = ctrl->opt_group->sublabel_width * ctrl->m_em_unit;
                 if (option.label_width >= 0) {
                     if (option.label_width != 0) {
@@ -609,6 +620,9 @@ void OG_CustomCtrl::CtrlLine::render(wxDC& dc, wxCoord v_pos)
             }
         }
 
+        //round it to next m_em_unit
+        h_pos += (h_pos % ctrl->m_em_unit == 0 ) ? 0 : ctrl->m_em_unit - (h_pos % ctrl->m_em_unit);
+
         if (field && field->undo_to_sys_bitmap()) {
             h_pos = draw_act_bmps(dc, wxPoint(h_pos, v_pos), field->undo_to_sys_bitmap()->bmp(), field->undo_bitmap()->bmp(), field->blink(), bmp_rect_id++);
             if (field->getSizer())
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 29e73abaea5..fe9f6d89d45 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -1698,6 +1698,10 @@ bool Tab::create_pages(std::string setting_type_name, int idx_page)
             }
 
             Option option = current_group->get_option(setting_id, id);
+            if (current_group->label_width >= 0)
+                option.opt.label_width = current_group->label_width;
+            if (current_group->sidetext_width >= 0)
+                option.opt.sidetext_width = current_group->sidetext_width;
 
             bool colored = false;
             wxString label_path;