diff --git a/src/libslic3r/Fill/Fill.cpp b/src/libslic3r/Fill/Fill.cpp
index 9afe4c665..c4f46e0ea 100644
--- a/src/libslic3r/Fill/Fill.cpp
+++ b/src/libslic3r/Fill/Fill.cpp
@@ -138,9 +138,13 @@ std::vector<SurfaceFill> group_fills(const Layer &layer)
                     params.density = float(layerm.region()->config().over_bridge_flow_ratio.get_abs_value(1));
                 }
 
+                //note: same as getRoleFromSurfaceType()
                 params.role = erInternalInfill;
                 if (is_bridge) {
-                    params.role = erBridgeInfill;
+                    if(surface.has_pos_bottom())
+                        params.role = erBridgeInfill;
+                    else
+                        params.role = erInternalBridgeInfill;
                 } else if (surface.has_fill_solid()) {
                     if (surface.has_pos_top()) {
                         params.role = erTopSolidInfill;
diff --git a/src/libslic3r/GCode/GCodeProcessor.cpp b/src/libslic3r/GCode/GCodeProcessor.cpp
index 820f7f09e..15a1a758c 100644
--- a/src/libslic3r/GCode/GCodeProcessor.cpp
+++ b/src/libslic3r/GCode/GCodeProcessor.cpp
@@ -1282,7 +1282,7 @@ bool GCodeProcessor::process_simplify3d_tags(const std::string_view comment)
         return true;
     }
 
-    // ; bridge
+    // ; bridge (& internal bridge)
     pos = comment.find(" bridge");
     if (pos == 0) {
         m_extrusion_role = erBridgeInfill;
diff --git a/src/slic3r/GUI/CalibrationBedDialog.cpp b/src/slic3r/GUI/CalibrationBedDialog.cpp
index cafacc0e2..5be7305cb 100644
--- a/src/slic3r/GUI/CalibrationBedDialog.cpp
+++ b/src/slic3r/GUI/CalibrationBedDialog.cpp
@@ -2,7 +2,7 @@
 #include "I18N.hpp"
 #include "libslic3r/Model.hpp"
 #include "libslic3r/Utils.hpp"
-#include "AppConfig.hpp"
+#include "libslic3r/AppConfig.hpp"
 #include "GUI.hpp"
 #include "GUI_ObjectList.hpp"
 #include "Plater.hpp"
diff --git a/src/slic3r/GUI/CalibrationBridgeDialog.cpp b/src/slic3r/GUI/CalibrationBridgeDialog.cpp
index cf1a9a473..d26e04d44 100644
--- a/src/slic3r/GUI/CalibrationBridgeDialog.cpp
+++ b/src/slic3r/GUI/CalibrationBridgeDialog.cpp
@@ -2,7 +2,7 @@
 #include "I18N.hpp"
 #include "libslic3r/Model.hpp"
 #include "libslic3r/Utils.hpp"
-#include "AppConfig.hpp"
+#include "libslic3r/AppConfig.hpp"
 #include "GUI.hpp"
 #include "GUI_ObjectList.hpp"
 #include "Plater.hpp"
diff --git a/src/slic3r/GUI/CalibrationFlowDialog.cpp b/src/slic3r/GUI/CalibrationFlowDialog.cpp
index fd179c8de..58d525e20 100644
--- a/src/slic3r/GUI/CalibrationFlowDialog.cpp
+++ b/src/slic3r/GUI/CalibrationFlowDialog.cpp
@@ -2,7 +2,7 @@
 #include "I18N.hpp"
 #include "libslic3r/Model.hpp"
 #include "libslic3r/Utils.hpp"
-#include "AppConfig.hpp"
+#include "libslic3r/AppConfig.hpp"
 #include "GUI.hpp"
 #include "GUI_ObjectList.hpp"
 #include "Plater.hpp"
diff --git a/src/slic3r/GUI/CalibrationOverBridgeDialog.cpp b/src/slic3r/GUI/CalibrationOverBridgeDialog.cpp
index c04e35089..1544706f0 100644
--- a/src/slic3r/GUI/CalibrationOverBridgeDialog.cpp
+++ b/src/slic3r/GUI/CalibrationOverBridgeDialog.cpp
@@ -2,7 +2,7 @@
 #include "I18N.hpp"
 #include "libslic3r/Model.hpp"
 #include "libslic3r/Utils.hpp"
-#include "AppConfig.hpp"
+#include "libslic3r/AppConfig.hpp"
 #include "GUI.hpp"
 #include "GUI_ObjectList.hpp"
 #include "Plater.hpp"
diff --git a/src/slic3r/GUI/CalibrationRetractionDialog.cpp b/src/slic3r/GUI/CalibrationRetractionDialog.cpp
index 9d2b660c1..4b454cd7f 100644
--- a/src/slic3r/GUI/CalibrationRetractionDialog.cpp
+++ b/src/slic3r/GUI/CalibrationRetractionDialog.cpp
@@ -2,7 +2,7 @@
 #include "I18N.hpp"
 #include "libslic3r/Model.hpp"
 #include "libslic3r/Utils.hpp"
-#include "AppConfig.hpp"
+#include "libslic3r/AppConfig.hpp"
 #include "GUI.hpp"
 #include "GUI_ObjectList.hpp"
 #include "Plater.hpp"
diff --git a/src/slic3r/GUI/CalibrationTempDialog.cpp b/src/slic3r/GUI/CalibrationTempDialog.cpp
index 390116290..eb0cf84da 100644
--- a/src/slic3r/GUI/CalibrationTempDialog.cpp
+++ b/src/slic3r/GUI/CalibrationTempDialog.cpp
@@ -3,7 +3,7 @@
 #include "libslic3r/Utils.hpp"
 #include "libslic3r/CustomGCode.hpp"
 #include "libslic3r/Model.hpp"
-#include "AppConfig.hpp"
+#include "libslic3r/AppConfig.hpp"
 #include "GUI.hpp"
 #include "GUI_ObjectList.hpp"
 #include "Plater.hpp"
diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp
index fa60afa58..3f2218c26 100644
--- a/src/slic3r/GUI/GUI_Preview.cpp
+++ b/src/slic3r/GUI/GUI_Preview.cpp
@@ -330,21 +330,21 @@ bool Preview::init(wxWindow* parent, Model* model)
 #if ENABLE_GCODE_VIEWER
         _L("Unknown") + "|1|" +
 #endif // ENABLE_GCODE_VIEWER        _L("Perimeter") + "|" +
-        _L("External perimeter") + "|" +
-        _L("Overhang perimeter") + "|" +
-        _L("Internal infill") + "|" +
-        _L("Solid infill") + "|" +
-        _L("Top solid infill") + "|" +
-        _L("Bridge infill") + "|" +
-        _L("Internal bridge infill") + "|" +
-        _L("Thin wall") + "|" +
-        _L("Gap fill") + "|" +
-        _L("Skirt") + "|" +
-        _L("Support material") + "|" +
-        _L(width_screen == large? "Support material interface": "Sup. mat. interface") + "|" +
-        _L("Wipe tower") + "|" +
-        _L("Mill") + "|" +
-        _L("Custom")
+        _L("External perimeter") + "|1|" +
+        _L("Overhang perimeter") + "|1|" +
+        _L("Internal infill") + "|1|" +
+        _L("Solid infill") + "|1|" +
+        _L("Top solid infill") + "|1|" +
+        _L("Bridge infill") + "|1|" +
+        _L("Internal bridge infill") + "|1|" +
+        _L("Thin wall") + "|1|" +
+        _L("Gap fill") + "|1|" +
+        _L("Skirt") + "|1|" +
+        _L("Support material") + "|1|" +
+        _L(width_screen == large? "Support material interface": "Sup. mat. interface") + "|1|" +
+        _L("Wipe tower") + "|1|" +
+        _L("Mill") + "|1|" +
+        _L("Custom") + "|1"
     );
     Slic3r::GUI::create_combochecklist(m_combochecklist_features, GUI::into_u8(_L("Feature types")), feature_items);
 
diff --git a/src/slic3r/GUI/OG_CustomCtrl.cpp b/src/slic3r/GUI/OG_CustomCtrl.cpp
index 56a11b67b..69ce9aee2 100644
--- a/src/slic3r/GUI/OG_CustomCtrl.cpp
+++ b/src/slic3r/GUI/OG_CustomCtrl.cpp
@@ -696,15 +696,15 @@ wxPoint OG_CustomCtrl::CtrlLine::draw_blinking_bmp(wxDC& dc, wxPoint pos, bool i
 wxCoord OG_CustomCtrl::CtrlLine::draw_act_bmps(wxDC& dc, wxPoint pos, const wxBitmap& bmp_undo_to_sys, const wxBitmap& bmp_undo, bool is_blinking, size_t rect_id)
 {
     wxCoord h_pos = pos.x;
-    wxCoord v_pos = pos.y;
+    wxCoord v_pos = pos.y + height / 2 - this->ctrl->m_bmp_blinking_sz.GetHeight() / 2;
 
-    dc.DrawBitmap(bmp_undo_to_sys, h_pos, v_pos + 5);
+    dc.DrawBitmap(bmp_undo_to_sys, h_pos, v_pos);
 
     int bmp_dim = get_bitmap_size(bmp_undo_to_sys).GetWidth();
     rects_undo_to_sys_icon[rect_id] = wxRect(h_pos, v_pos, bmp_dim, bmp_dim);
 
     h_pos += bmp_dim + ctrl->m_h_gap;
-    dc.DrawBitmap(bmp_undo, h_pos, v_pos + 5);
+    dc.DrawBitmap(bmp_undo, h_pos, v_pos);
 
     bmp_dim = get_bitmap_size(bmp_undo).GetWidth();
     rects_undo_icon[rect_id] = wxRect(h_pos, v_pos, bmp_dim, bmp_dim);