diff --git a/src/libslic3r/GCode/GCodeProcessor.cpp b/src/libslic3r/GCode/GCodeProcessor.cpp
index c866ae4067..40912dcc3e 100644
--- a/src/libslic3r/GCode/GCodeProcessor.cpp
+++ b/src/libslic3r/GCode/GCodeProcessor.cpp
@@ -208,6 +208,7 @@ void GCodeProcessor::TimeMachine::reset()
     std::fill(moves_time.begin(), moves_time.end(), 0.0f);
     std::fill(roles_time.begin(), roles_time.end(), 0.0f);
     layers_time = std::vector<float>();
+    prepare_time = 0.0f;
 }
 
 void GCodeProcessor::TimeMachine::simulate_st_synchronize(float additional_time)
@@ -315,7 +316,9 @@ void GCodeProcessor::TimeMachine::calculate_time(size_t keep_last_n_blocks, floa
 
         time += block_time;
         gcode_time.cache += block_time;
-        moves_time[static_cast<size_t>(block.move_type)] += block_time;
+        //BBS: don't calculate travel of start gcode into travel time
+        if (!block.flags.prepare_stage || block.move_type != EMoveType::Travel)
+            moves_time[static_cast<size_t>(block.move_type)] += block_time;
         roles_time[static_cast<size_t>(block.role)] += block_time;
         if (block.layer_id >= layers_time.size()) {
             const size_t curr_size = layers_time.size();
@@ -325,6 +328,9 @@ void GCodeProcessor::TimeMachine::calculate_time(size_t keep_last_n_blocks, floa
             }
         }
         layers_time[block.layer_id - 1] += block_time;
+        //BBS
+        if (block.flags.prepare_stage)
+            prepare_time += block_time;
         g1_times_cache.push_back({ block.g1_line_id, time });
         // update times for remaining time to printer stop placeholders
         auto it_stop_time = std::lower_bound(stop_times.begin(), stop_times.end(), block.g1_line_id,
@@ -458,7 +464,7 @@ void GCodeProcessor::TimeProcessor::post_process(const std::string& filename, st
                         //    (mode == PrintEstimatedStatistics::ETimeMode::Normal) ? "normal" : "silent",
                         //    get_time_dhms(machine.time).c_str());
                         sprintf(buf, "; model printing time: %s; total estimated time: %s\n",
-                                get_time_dhms(machine.time - machine.roles_time[ExtrusionRole::erCustom]).c_str(),
+                                get_time_dhms(machine.time - machine.prepare_time).c_str(),
                                 get_time_dhms(machine.time).c_str());
                         ret += buf;
                     }
@@ -1431,6 +1437,11 @@ float GCodeProcessor::get_time(PrintEstimatedStatistics::ETimeMode mode) const
     return (mode < PrintEstimatedStatistics::ETimeMode::Count) ? m_time_processor.machines[static_cast<size_t>(mode)].time : 0.0f;
 }
 
+float GCodeProcessor::get_prepare_time(PrintEstimatedStatistics::ETimeMode mode) const
+{
+    return (mode < PrintEstimatedStatistics::ETimeMode::Count) ? m_time_processor.machines[static_cast<size_t>(mode)].prepare_time : 0.0f;
+}
+
 std::string GCodeProcessor::get_time_dhm(PrintEstimatedStatistics::ETimeMode mode) const
 {
     return (mode < PrintEstimatedStatistics::ETimeMode::Count) ? short_time(get_time_dhms(m_time_processor.machines[static_cast<size_t>(mode)].time)) : std::string("N/A");
@@ -2663,10 +2674,12 @@ void GCodeProcessor::process_G1(const GCodeReader::GCodeLine& line)
 
         TimeBlock block;
         block.move_type = type;
-        block.role = m_extrusion_role;
+        //BBS: don't calculate travel time into extrusion path, except travel inside start and end gcode.
+        block.role = (type != EMoveType::Travel || m_extrusion_role == erCustom) ? m_extrusion_role : erNone;
         block.distance = distance;
         block.g1_line_id = m_g1_line_id;
         block.layer_id = std::max<unsigned int>(1, m_layer_id);
+        block.flags.prepare_stage = m_processing_start_custom_gcode;
 
         //BBS: limite the cruise according to centripetal acceleration
         //Only need to handle when both prev and curr segment has movement in x-y plane
@@ -3085,10 +3098,12 @@ void  GCodeProcessor::process_G2_G3(const GCodeReader::GCodeLine& line)
 
         TimeBlock block;
         block.move_type = type;
-        block.role = m_extrusion_role;
+        //BBS: don't calculate travel time into extrusion path, except travel inside start and end gcode.
+        block.role = (type != EMoveType::Travel || m_extrusion_role == erCustom) ? m_extrusion_role : erNone;
         block.distance = delta_xyz;
         block.g1_line_id = m_g1_line_id;
         block.layer_id = std::max<unsigned int>(1, m_layer_id);
+        block.flags.prepare_stage = m_processing_start_custom_gcode;
 
         // BBS: calculates block cruise feedrate
         // For arc move, we need to limite the cruise according to centripetal acceleration which is
@@ -4015,6 +4030,7 @@ void GCodeProcessor::update_estimated_times_stats()
     auto update_mode = [this](PrintEstimatedStatistics::ETimeMode mode) {
         PrintEstimatedStatistics::Mode& data = m_result.print_statistics.modes[static_cast<size_t>(mode)];
         data.time = get_time(mode);
+        data.prepare_time = get_prepare_time(mode);
         data.custom_gcode_times = get_custom_gcode_times(mode, true);
         data.moves_times = get_moves_time(mode);
         data.roles_times = get_roles_time(mode);
diff --git a/src/libslic3r/GCode/GCodeProcessor.hpp b/src/libslic3r/GCode/GCodeProcessor.hpp
index a0866eca93..e95527605b 100644
--- a/src/libslic3r/GCode/GCodeProcessor.hpp
+++ b/src/libslic3r/GCode/GCodeProcessor.hpp
@@ -49,6 +49,7 @@ namespace Slic3r {
         struct Mode
         {
             float time;
+            float prepare_time;
             std::vector<std::pair<CustomGCode::Type, std::pair<float, float>>> custom_gcode_times;
             std::vector<std::pair<EMoveType, float>> moves_times;
             std::vector<std::pair<ExtrusionRole, float>> roles_times;
@@ -56,6 +57,7 @@ namespace Slic3r {
 
             void reset() {
                 time = 0.0f;
+                prepare_time = 0.0f;
                 custom_gcode_times.clear();
                 moves_times.clear();
                 roles_times.clear();
@@ -298,6 +300,7 @@ namespace Slic3r {
             {
                 bool recalculate{ false };
                 bool nominal_length{ false };
+                bool prepare_stage{ false };
             };
 
             EMoveType move_type{ EMoveType::Noop };
@@ -381,6 +384,8 @@ namespace Slic3r {
             std::array<float, static_cast<size_t>(EMoveType::Count)> moves_time;
             std::array<float, static_cast<size_t>(ExtrusionRole::erCount)> roles_time;
             std::vector<float> layers_time;
+            //BBS: prepare stage time before print model, including start gcode time and mostly same with start gcode time
+            float prepare_time;
 
             void reset();
 
@@ -681,6 +686,7 @@ namespace Slic3r {
         void finalize(bool post_process);
 
         float get_time(PrintEstimatedStatistics::ETimeMode mode) const;
+        float get_prepare_time(PrintEstimatedStatistics::ETimeMode mode) const;
         std::string get_time_dhm(PrintEstimatedStatistics::ETimeMode mode) const;
         std::vector<std::pair<CustomGCode::Type, std::pair<float, float>>> get_custom_gcode_times(PrintEstimatedStatistics::ETimeMode mode, bool include_remaining) const;
 
diff --git a/src/slic3r/GUI/GCodeViewer.cpp b/src/slic3r/GUI/GCodeViewer.cpp
index 57533af3fe..d8fc148c95 100644
--- a/src/slic3r/GUI/GCodeViewer.cpp
+++ b/src/slic3r/GUI/GCodeViewer.cpp
@@ -942,7 +942,6 @@ void GCodeViewer::update_by_mode(ConfigOptionMode mode)
     // BBS for first layer inspection
     view_type_items.push_back(EViewType::FilamentId);
 
-    options_items.push_back(EMoveType::Seam);
     options_items.push_back(EMoveType::Travel);
     options_items.push_back(EMoveType::Retract);
     options_items.push_back(EMoveType::Unretract);
@@ -950,6 +949,8 @@ void GCodeViewer::update_by_mode(ConfigOptionMode mode)
     if (mode == ConfigOptionMode::comDevelop) {
         options_items.push_back(EMoveType::Tool_change);
     }
+    //BBS: seam is not real move and extrusion, put at last line
+    options_items.push_back(EMoveType::Seam);
 }
 
 std::vector<int> GCodeViewer::get_plater_extruder()
@@ -4365,6 +4366,11 @@ void GCodeViewer::render_legend(float &legend_height, int canvas_width, int canv
         return (it != time_mode.roles_times.end()) ? std::make_pair(it->second, it->second / time_mode.time) : std::make_pair(0.0f, 0.0f);
     };
 
+    auto move_time_and_percent = [time_mode](EMoveType move_type) {
+        auto it = std::find_if(time_mode.moves_times.begin(), time_mode.moves_times.end(), [move_type](const std::pair<EMoveType, float>& item) { return move_type == item.first; });
+        return (it != time_mode.moves_times.end()) ? std::make_pair(it->second, it->second / time_mode.time) : std::make_pair(0.0f, 0.0f);
+    };
+
     auto used_filament_per_role = [this, imperial_units](ExtrusionRole role) {
         auto it = m_print_statistics.used_filaments_per_role.find(role);
         if (it == m_print_statistics.used_filaments_per_role.end())
@@ -4438,7 +4444,9 @@ void GCodeViewer::render_legend(float &legend_height, int canvas_width, int canv
     std::vector<float> offsets;
     std::vector<std::string> labels;
     std::vector<std::string> times;
+    std::string travel_time;
     std::vector<std::string> percents;
+    std::string travel_percent;
     std::vector<double> model_used_filaments_m;
     std::vector<double> model_used_filaments_g;
     double total_model_used_filament_m = 0, total_model_used_filament_g = 0;
@@ -4485,6 +4493,17 @@ void GCodeViewer::render_legend(float &legend_height, int canvas_width, int canv
             }
         }
 
+        //BBS: get travel time and percent
+        {
+            auto [time, percent] = move_time_and_percent(EMoveType::Travel);
+            travel_time = (time > 0.0f) ? short_time(get_time_dhms(time)) : "";
+            if (percent == 0)
+                ::sprintf(buffer, "0%%");
+            else
+                percent > 0.001 ? ::sprintf(buffer, "%.1f%%", percent * 100) : ::sprintf(buffer, "<0.1%%");
+            travel_percent = buffer;
+        }
+
         offsets = calculate_offsets({ {_u8L("Line Type"), labels}, {_u8L("Time"), times}, {_u8L("Percent"), percents}, {_u8L("Display"), {""}}}, icon_size);
         append_headers({{_u8L("Line Type"), offsets[0]}, {_u8L("Time"), offsets[1]}, {_u8L("Percent"), offsets[2]}, {_u8L("Display"), offsets[3]}});
         break;
@@ -4573,7 +4592,7 @@ void GCodeViewer::render_legend(float &legend_height, int canvas_width, int canv
         };
         const bool visible = m_buffers[buffer_id(type)].visible;
         if (type == EMoveType::Travel) {
-            //TODO display travel time
+            //BBS: only display travel time in FeatureType view
             append_option_item_with_type(type, Travel_Colors[0], _u8L("Travel"), visible);
         }
         else if (type == EMoveType::Seam)
@@ -4613,7 +4632,23 @@ void GCodeViewer::render_legend(float &legend_height, int canvas_width, int canv
         }
 
         for(auto item : options_items) {
-            append_option_item(item, offsets);
+            if (item != EMoveType::Travel) {
+                append_option_item(item, offsets);
+            } else {
+                //BBS: show travel time in FeatureType view
+                const bool visible = m_buffers[buffer_id(item)].visible;
+                std::vector<std::pair<std::string, float>> columns_offsets;
+                columns_offsets.push_back({ _u8L("Travel"), offsets[0] });
+                columns_offsets.push_back({ travel_time, offsets[1] });
+                columns_offsets.push_back({ travel_percent, offsets[2] });
+                append_item(EItemType::Rect, Travel_Colors[0], columns_offsets, true, visible, [this, item, visible]() {
+                        m_buffers[buffer_id(item)].visible = !m_buffers[buffer_id(item)].visible;
+                        // update buffers' render paths
+                        refresh_render_paths(false, false);
+                        update_moves_slider();
+                        wxGetApp().plater()->get_current_canvas3D()->set_as_dirty();
+                    });
+            }
         }
         break;
     }
@@ -5209,19 +5244,19 @@ void GCodeViewer::render_legend(float &legend_height, int canvas_width, int canv
             auto it = std::find_if(time_mode.roles_times.begin(), time_mode.roles_times.end(), [role](const std::pair<ExtrusionRole, float>& item) { return role == item.first; });
             return (it != time_mode.roles_times.end()) ? it->second : 0.0f;
         };
-        //BBS: start gcode is prepeare time
-        if (role_time(erCustom) != 0.0f) {
+        //BBS: start gcode is mostly same with prepeare time
+        if (time_mode.prepare_time != 0.0f) {
             ImGui::Dummy({ window_padding, window_padding });
             ImGui::SameLine();
             imgui.text(prepare_str + ":");
             ImGui::SameLine(max_len);
-            imgui.text(short_time(get_time_dhms(role_time(erCustom))));
+            imgui.text(short_time(get_time_dhms(time_mode.prepare_time)));
         }
         ImGui::Dummy({ window_padding, window_padding });
         ImGui::SameLine();
         imgui.text(print_str + ":");
         ImGui::SameLine(max_len);
-        imgui.text(short_time(get_time_dhms(time_mode.time - role_time(erCustom))));
+        imgui.text(short_time(get_time_dhms(time_mode.time - time_mode.prepare_time)));
         ImGui::Dummy({ window_padding, window_padding });
         ImGui::SameLine();
         imgui.text(total_str + ":");