diff --git a/src/libslic3r/GCode/GCodeProcessor.cpp b/src/libslic3r/GCode/GCodeProcessor.cpp
index 493621e5e..7f121689b 100644
--- a/src/libslic3r/GCode/GCodeProcessor.cpp
+++ b/src/libslic3r/GCode/GCodeProcessor.cpp
@@ -1088,9 +1088,7 @@ void GCodeProcessor::reset()
     m_wiping = false;
 
     m_line_id = 0;
-#if ENABLE_SEAMS_VISUALIZATION
     m_last_line_id = 0;
-#endif // ENABLE_SEAMS_VISUALIZATION
     m_feedrate = 0.0f;
     m_width = 0.0f;
     m_height = 0.0f;
@@ -1487,10 +1485,8 @@ void GCodeProcessor::process_tags(const std::string_view comment)
     // extrusion role tag
     if (boost::starts_with(comment, reserved_tag(ETags::Role))) {
         set_extrusion_role(ExtrusionEntity::string_to_role(comment.substr(reserved_tag(ETags::Role).length())));
-#if ENABLE_SEAMS_VISUALIZATION
         if (m_extrusion_role == erExternalPerimeter)
             m_seams_detector.activate(true);
-#endif // ENABLE_SEAMS_VISUALIZATION
         m_processing_start_custom_gcode = (m_extrusion_role == erCustom && m_g1_line_id == 0);
         return;
     }
@@ -1629,10 +1625,9 @@ bool GCodeProcessor::process_cura_tags(const std::string_view comment)
             BOOST_LOG_TRIVIAL(warning) << "GCodeProcessor found unknown extrusion role: " << type;
         }
 
-#if ENABLE_SEAMS_VISUALIZATION
         if (m_extrusion_role == erExternalPerimeter)
             m_seams_detector.activate(true);
-#endif // ENABLE_SEAMS_VISUALIZATION
+
         return true;
     }
 
@@ -1697,9 +1692,7 @@ bool GCodeProcessor::process_simplify3d_tags(const std::string_view comment)
     pos = cmt.find(" outer perimeter");
     if (pos == 0) {
         set_extrusion_role(erExternalPerimeter);
-#if ENABLE_SEAMS_VISUALIZATION
         m_seams_detector.activate(true);
-#endif // ENABLE_SEAMS_VISUALIZATION
         return true;
     }
 
@@ -1854,10 +1847,8 @@ bool GCodeProcessor::process_craftware_tags(const std::string_view comment)
             BOOST_LOG_TRIVIAL(warning) << "GCodeProcessor found unknown extrusion role: " << type;
         }
 
-#if ENABLE_SEAMS_VISUALIZATION
         if (m_extrusion_role == erExternalPerimeter)
             m_seams_detector.activate(true);
-#endif // ENABLE_SEAMS_VISUALIZATION
 
         return true;
     }
@@ -1898,10 +1889,9 @@ bool GCodeProcessor::process_ideamaker_tags(const std::string_view comment)
             BOOST_LOG_TRIVIAL(warning) << "GCodeProcessor found unknown extrusion role: " << type;
         }
 
-#if ENABLE_SEAMS_VISUALIZATION
         if (m_extrusion_role == erExternalPerimeter)
             m_seams_detector.activate(true);
-#endif // ENABLE_SEAMS_VISUALIZATION
+
         return true;
     }
 
@@ -1970,9 +1960,7 @@ bool GCodeProcessor::process_kissslicer_tags(const std::string_view comment)
     pos = comment.find(" 'Perimeter Path'");
     if (pos == 0) {
         set_extrusion_role(erExternalPerimeter);
-#if ENABLE_SEAMS_VISUALIZATION
         m_seams_detector.activate(true);
-#endif // ENABLE_SEAMS_VISUALIZATION
         return true;
     }
 
@@ -2346,7 +2334,6 @@ void GCodeProcessor::process_G1(const GCodeReader::GCodeLine& line)
             machine.calculate_time(TimeProcessor::Planner::queue_size);
     }
 
-#if ENABLE_SEAMS_VISUALIZATION
     if (m_seams_detector.is_active()) {
         // check for seam starting vertex
         if (type == EMoveType::Extrude && m_extrusion_role == erExternalPerimeter && !m_seams_detector.has_first_vertex())
@@ -2370,7 +2357,6 @@ void GCodeProcessor::process_G1(const GCodeReader::GCodeLine& line)
             m_seams_detector.activate(false);
         }
     }
-#endif // ENABLE_SEAMS_VISUALIZATION
 
     // store move
     store_move_vertex(type);
@@ -2825,18 +2811,12 @@ void GCodeProcessor::process_T(const std::string_view command)
 
 void GCodeProcessor::store_move_vertex(EMoveType type)
 {
-#if ENABLE_SEAMS_VISUALIZATION
     m_last_line_id = (type == EMoveType::Color_change || type == EMoveType::Pause_Print || type == EMoveType::Custom_GCode) ?
         m_line_id + 1 :
         ((type == EMoveType::Seam) ? m_last_line_id : m_line_id);
-#endif // ENABLE_SEAMS_VISUALIZATION
 
     MoveVertex vertex = {
-#if ENABLE_SEAMS_VISUALIZATION
         m_last_line_id,
-#else
-        (type == EMoveType::Color_change || type == EMoveType::Pause_Print || type == EMoveType::Custom_GCode) ? m_line_id + 1 : m_line_id,
-#endif // ENABLE_SEAMS_VISUALIZATION
         type,
         m_extrusion_role,
         m_extruder_id,
diff --git a/src/libslic3r/GCode/GCodeProcessor.hpp b/src/libslic3r/GCode/GCodeProcessor.hpp
index d683dacd2..2141b1c07 100644
--- a/src/libslic3r/GCode/GCodeProcessor.hpp
+++ b/src/libslic3r/GCode/GCodeProcessor.hpp
@@ -12,9 +12,7 @@
 #include <vector>
 #include <string>
 #include <string_view>
-#if ENABLE_SEAMS_VISUALIZATION
 #include <optional>
-#endif // ENABLE_SEAMS_VISUALIZATION
 
 namespace Slic3r {
 
@@ -23,9 +21,7 @@ namespace Slic3r {
         Noop,
         Retract,
         Unretract,
-#if ENABLE_SEAMS_VISUALIZATION
         Seam,
-#endif // ENABLE_SEAMS_VISUALIZATION
         Tool_change,
         Color_change,
         Pause_Print,
@@ -363,7 +359,6 @@ namespace Slic3r {
             void reset();
         };
 
-#if ENABLE_SEAMS_VISUALIZATION
         class SeamsDetector
         {
             bool m_active{ false };
@@ -384,7 +379,6 @@ namespace Slic3r {
             bool is_active() const { return m_active; }
             bool has_first_vertex() const { return m_first_vertex.has_value(); }
         };
-#endif // ENABLE_SEAMS_VISUALIZATION
 
 #if ENABLE_GCODE_VIEWER_DATA_CHECKING
         struct DataChecker
@@ -470,9 +464,7 @@ namespace Slic3r {
         bool m_wiping;
 
         unsigned int m_line_id;
-#if ENABLE_SEAMS_VISUALIZATION
         unsigned int m_last_line_id;
-#endif // ENABLE_SEAMS_VISUALIZATION
         float m_feedrate; // mm/s
         float m_width; // mm
         float m_height; // mm
@@ -491,9 +483,7 @@ namespace Slic3r {
         unsigned int m_layer_id;
         CpColor m_cp_color;
         bool m_use_volumetric_e;
-#if ENABLE_SEAMS_VISUALIZATION
         SeamsDetector m_seams_detector;
-#endif // ENABLE_SEAMS_VISUALIZATION
 
         enum class EProducer
         {
diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp
index 2f52d4530..0455f6559 100644
--- a/src/libslic3r/Technologies.hpp
+++ b/src/libslic3r/Technologies.hpp
@@ -41,8 +41,6 @@
 //====================
 #define ENABLE_2_4_0_ALPHA0 1
 
-// Enable visualization of seams in preview
-#define ENABLE_SEAMS_VISUALIZATION (1 && ENABLE_2_4_0_ALPHA0)
 // Enable project dirty state manager
 #define ENABLE_PROJECT_DIRTY_STATE (1 && ENABLE_2_4_0_ALPHA0)
 // Enable project dirty state manager debug window
diff --git a/src/slic3r/GUI/GCodeViewer.cpp b/src/slic3r/GUI/GCodeViewer.cpp
index 0af5f2479..e185c9cb7 100644
--- a/src/slic3r/GUI/GCodeViewer.cpp
+++ b/src/slic3r/GUI/GCodeViewer.cpp
@@ -121,9 +121,7 @@ bool GCodeViewer::Path::matches(const GCodeProcessor::MoveVertex& move) const
     case EMoveType::Custom_GCode:
     case EMoveType::Retract:
     case EMoveType::Unretract:
-#if ENABLE_SEAMS_VISUALIZATION
     case EMoveType::Seam:
-#endif // ENABLE_SEAMS_VISUALIZATION
     case EMoveType::Extrude: {
         // use rounding to reduce the number of generated paths
         return type == move.type && extruder_id == move.extruder_id && cp_color_id == move.cp_color_id && role == move.extrusion_role &&
@@ -507,9 +505,7 @@ const std::vector<GCodeViewer::Color> GCodeViewer::Extrusion_Role_Colors {{
 const std::vector<GCodeViewer::Color> GCodeViewer::Options_Colors {{
     { 0.803f, 0.135f, 0.839f },   // Retractions
     { 0.287f, 0.679f, 0.810f },   // Unretractions
-#if ENABLE_SEAMS_VISUALIZATION
     { 0.900f, 0.900f, 0.900f },   // Seams
-#endif // ENABLE_SEAMS_VISUALIZATION
     { 0.758f, 0.744f, 0.389f },   // ToolChanges
     { 0.856f, 0.582f, 0.546f },   // ColorChanges
     { 0.322f, 0.942f, 0.512f },   // PausePrints
@@ -552,20 +548,12 @@ GCodeViewer::GCodeViewer()
         case EMoveType::Pause_Print:
         case EMoveType::Custom_GCode:
         case EMoveType::Retract:
-#if ENABLE_SEAMS_VISUALIZATION
         case EMoveType::Unretract:
         case EMoveType::Seam: {
             buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Point;
             buffer.vertices.format = VBuffer::EFormat::Position;
             break;
         }
-#else
-        case EMoveType::Unretract: {
-            buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Point;
-            buffer.vertices.format = VBuffer::EFormat::Position;
-            break;
-        }
-#endif // ENABLE_SEAMS_VISUALIZATION
         case EMoveType::Wipe:
         case EMoveType::Extrude: {
             buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Triangle;
@@ -775,18 +763,11 @@ void GCodeViewer::render() const
             case EMoveType::Pause_Print:
             case EMoveType::Custom_GCode:
             case EMoveType::Retract:
-#if ENABLE_SEAMS_VISUALIZATION
             case EMoveType::Unretract:
             case EMoveType::Seam: {
                 buffer.shader = wxGetApp().is_glsl_version_greater_or_equal_to(1, 20) ? "options_120" : "options_110";
                 break;
             }
-#else
-            case EMoveType::Unretract: {
-                buffer.shader = wxGetApp().is_glsl_version_greater_or_equal_to(1, 20) ? "options_120" : "options_110";
-                break;
-            }
-#endif // ENABLE_SEAMS_VISUALIZATION
             case EMoveType::Wipe:
             case EMoveType::Extrude: {
                 buffer.shader = "gouraud_light";
@@ -911,9 +892,7 @@ unsigned int GCodeViewer::get_options_visibility_flags() const
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::Wipe), is_toolpath_move_type_visible(EMoveType::Wipe));
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::Retractions), is_toolpath_move_type_visible(EMoveType::Retract));
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::Unretractions), is_toolpath_move_type_visible(EMoveType::Unretract));
-#if ENABLE_SEAMS_VISUALIZATION
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::Seams), is_toolpath_move_type_visible(EMoveType::Seam));
-#endif // ENABLE_SEAMS_VISUALIZATION
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::ToolChanges), is_toolpath_move_type_visible(EMoveType::Tool_change));
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::ColorChanges), is_toolpath_move_type_visible(EMoveType::Color_change));
     flags = set_flag(flags, static_cast<unsigned int>(Preview::OptionType::PausePrints), is_toolpath_move_type_visible(EMoveType::Pause_Print));
@@ -934,9 +913,7 @@ void GCodeViewer::set_options_visibility_from_flags(unsigned int flags)
     set_toolpath_move_type_visible(EMoveType::Wipe, is_flag_set(static_cast<unsigned int>(Preview::OptionType::Wipe)));
     set_toolpath_move_type_visible(EMoveType::Retract, is_flag_set(static_cast<unsigned int>(Preview::OptionType::Retractions)));
     set_toolpath_move_type_visible(EMoveType::Unretract, is_flag_set(static_cast<unsigned int>(Preview::OptionType::Unretractions)));
-#if ENABLE_SEAMS_VISUALIZATION
     set_toolpath_move_type_visible(EMoveType::Seam, is_flag_set(static_cast<unsigned int>(Preview::OptionType::Seams)));
-#endif // ENABLE_SEAMS_VISUALIZATION
     set_toolpath_move_type_visible(EMoveType::Tool_change, is_flag_set(static_cast<unsigned int>(Preview::OptionType::ToolChanges)));
     set_toolpath_move_type_visible(EMoveType::Color_change, is_flag_set(static_cast<unsigned int>(Preview::OptionType::ColorChanges)));
     set_toolpath_move_type_visible(EMoveType::Pause_Print, is_flag_set(static_cast<unsigned int>(Preview::OptionType::PausePrints)));
@@ -2164,9 +2141,7 @@ void GCodeViewer::refresh_render_paths(bool keep_sequential_current_first, bool
         case EMoveType::Custom_GCode: { color = Options_Colors[static_cast<unsigned int>(EOptionsColors::CustomGCodes)]; break; }
         case EMoveType::Retract:      { color = Options_Colors[static_cast<unsigned int>(EOptionsColors::Retractions)]; break; }
         case EMoveType::Unretract:    { color = Options_Colors[static_cast<unsigned int>(EOptionsColors::Unretractions)]; break; }
-#if ENABLE_SEAMS_VISUALIZATION
         case EMoveType::Seam:         { color = Options_Colors[static_cast<unsigned int>(EOptionsColors::Seams)]; break; }
-#endif // ENABLE_SEAMS_VISUALIZATION
         case EMoveType::Extrude: {
             if (!top_layer_only ||
                 m_sequential_view.current.last == global_endpoints.last ||
@@ -3262,12 +3237,8 @@ void GCodeViewer::render_legend(float& legend_height) const
             available(EMoveType::Pause_Print) ||
             available(EMoveType::Retract) ||
             available(EMoveType::Tool_change) ||
-#if ENABLE_SEAMS_VISUALIZATION
             available(EMoveType::Unretract) ||
             available(EMoveType::Seam);
-#else
-            available(EMoveType::Unretract);
-#endif // ENABLE_SEAMS_VISUALIZATION
     };
 
     auto add_option = [this, append_item](EMoveType move_type, EOptionsColors color, const std::string& text) {
@@ -3285,9 +3256,7 @@ void GCodeViewer::render_legend(float& legend_height) const
         // items
         add_option(EMoveType::Retract, EOptionsColors::Retractions, _u8L("Retractions"));
         add_option(EMoveType::Unretract, EOptionsColors::Unretractions, _u8L("Deretractions"));
-#if ENABLE_SEAMS_VISUALIZATION
         add_option(EMoveType::Seam, EOptionsColors::Seams, _u8L("Seams"));
-#endif // ENABLE_SEAMS_VISUALIZATION
         add_option(EMoveType::Tool_change, EOptionsColors::ToolChanges, _u8L("Tool changes"));
         add_option(EMoveType::Color_change, EOptionsColors::ColorChanges, _u8L("Color changes"));
         add_option(EMoveType::Pause_Print, EOptionsColors::PausePrints, _u8L("Print pauses"));
diff --git a/src/slic3r/GUI/GCodeViewer.hpp b/src/slic3r/GUI/GCodeViewer.hpp
index e62ab47af..0c20b764c 100644
--- a/src/slic3r/GUI/GCodeViewer.hpp
+++ b/src/slic3r/GUI/GCodeViewer.hpp
@@ -38,9 +38,7 @@ class GCodeViewer
     {
         Retractions,
         Unretractions,
-#if ENABLE_SEAMS_VISUALIZATION
         Seams,
-#endif // ENABLE_SEAMS_VISUALIZATION
         ToolChanges,
         ColorChanges,
         PausePrints,
diff --git a/src/slic3r/GUI/GUI_Preview.cpp b/src/slic3r/GUI/GUI_Preview.cpp
index 7b5705c47..ad762f134 100644
--- a/src/slic3r/GUI/GUI_Preview.cpp
+++ b/src/slic3r/GUI/GUI_Preview.cpp
@@ -264,9 +264,7 @@ bool Preview::init(wxWindow* parent, Model* model)
         get_option_type_string(OptionType::Wipe) + "|0|" +
         get_option_type_string(OptionType::Retractions) + "|0|" +
         get_option_type_string(OptionType::Unretractions) + "|0|" +
-#if ENABLE_SEAMS_VISUALIZATION
         get_option_type_string(OptionType::Seams) + "|0|" +
-#endif // ENABLE_SEAMS_VISUALIZATION
         get_option_type_string(OptionType::ToolChanges) + "|0|" +
         get_option_type_string(OptionType::ColorChanges) + "|0|" +
         get_option_type_string(OptionType::PausePrints) + "|0|" +
@@ -1033,9 +1031,7 @@ wxString Preview::get_option_type_string(OptionType type) const
     case OptionType::Wipe:          { return _L("Wipe"); }
     case OptionType::Retractions:   { return _L("Retractions"); }
     case OptionType::Unretractions: { return _L("Deretractions"); }
-#if ENABLE_SEAMS_VISUALIZATION
     case OptionType::Seams:         { return _L("Seams"); }
-#endif // ENABLE_SEAMS_VISUALIZATION
     case OptionType::ToolChanges:   { return _L("Tool changes"); }
     case OptionType::ColorChanges:  { return _L("Color changes"); }
     case OptionType::PausePrints:   { return _L("Print pauses"); }
diff --git a/src/slic3r/GUI/GUI_Preview.hpp b/src/slic3r/GUI/GUI_Preview.hpp
index 2165b11c0..f8a41fd92 100644
--- a/src/slic3r/GUI/GUI_Preview.hpp
+++ b/src/slic3r/GUI/GUI_Preview.hpp
@@ -121,9 +121,7 @@ public:
         Wipe,
         Retractions,
         Unretractions,
-#if ENABLE_SEAMS_VISUALIZATION
         Seams,
-#endif // ENABLE_SEAMS_VISUALIZATION
         ToolChanges,
         ColorChanges,
         PausePrints,