diff --git a/src/libslic3r/GCode/GCodeProcessor.cpp b/src/libslic3r/GCode/GCodeProcessor.cpp
index 60af399c0..a217fa102 100644
--- a/src/libslic3r/GCode/GCodeProcessor.cpp
+++ b/src/libslic3r/GCode/GCodeProcessor.cpp
@@ -828,6 +828,9 @@ bool GCodeProcessor::contains_reserved_tags(const std::string& gcode, unsigned i
 }
 
 GCodeProcessor::GCodeProcessor()
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+: m_options_z_corrector(m_result)
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
 {
     reset();
     m_time_processor.machines[static_cast<size_t>(PrintEstimatedStatistics::ETimeMode::Normal)].line_m73_main_mask = "M73 P%s R%s\n";
@@ -1202,6 +1205,10 @@ void GCodeProcessor::reset()
     m_last_default_color_id = 0;
 #endif // ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
 
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+    m_options_z_corrector.reset();
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
+
 #if ENABLE_GCODE_VIEWER_DATA_CHECKING
     m_mm3_per_mm_compare.reset();
     m_height_compare.reset();
@@ -1781,6 +1788,9 @@ void GCodeProcessor::process_tags(const std::string_view comment)
 #if ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
             CustomGCode::Item item = { static_cast<double>(m_end_position[2]), CustomGCode::ColorChange, extruder_id + 1, color, "" };
             m_result.custom_gcode_per_print_z.emplace_back(item);
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+            m_options_z_corrector.set();
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
             process_custom_gcode_time(CustomGCode::ColorChange);
             process_filaments(CustomGCode::ColorChange);
 #endif // ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
@@ -1800,6 +1810,9 @@ void GCodeProcessor::process_tags(const std::string_view comment)
 #if ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
         CustomGCode::Item item = { static_cast<double>(m_end_position[2]), CustomGCode::PausePrint, m_extruder_id + 1, "", "" };
         m_result.custom_gcode_per_print_z.emplace_back(item);
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+        m_options_z_corrector.set();
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
 #endif // ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
         process_custom_gcode_time(CustomGCode::PausePrint);
         return;
@@ -1811,6 +1824,9 @@ void GCodeProcessor::process_tags(const std::string_view comment)
 #if ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
         CustomGCode::Item item = { static_cast<double>(m_end_position[2]), CustomGCode::Custom, m_extruder_id + 1, "", "" };
         m_result.custom_gcode_per_print_z.emplace_back(item);
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+        m_options_z_corrector.set();
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
 #endif // ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
         return;
     }
@@ -2391,7 +2407,9 @@ void GCodeProcessor::process_G1(const GCodeReader::GCodeLine& line)
         else {
             if (m_end_position[Z] > m_extruded_last_z + EPSILON) {
                 m_height = m_end_position[Z] - m_extruded_last_z;
+#if !ENABLE_FIX_PREVIEW_OPTIONS_Z
                 m_extruded_last_z = m_end_position[Z];
+#endif // !ENABLE_FIX_PREVIEW_OPTIONS_Z
             }
         }
 
@@ -2401,6 +2419,11 @@ void GCodeProcessor::process_G1(const GCodeReader::GCodeLine& line)
         if (m_end_position[Z] == 0.0f)
             m_end_position[Z] = m_height;
 
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+        m_extruded_last_z = m_end_position[Z];
+        m_options_z_corrector.update(m_height);
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
+
 #if ENABLE_GCODE_VIEWER_DATA_CHECKING
         m_height_compare.update(m_height, m_extrusion_role);
 #endif // ENABLE_GCODE_VIEWER_DATA_CHECKING
diff --git a/src/libslic3r/GCode/GCodeProcessor.hpp b/src/libslic3r/GCode/GCodeProcessor.hpp
index bb9310888..a1730daf2 100644
--- a/src/libslic3r/GCode/GCodeProcessor.hpp
+++ b/src/libslic3r/GCode/GCodeProcessor.hpp
@@ -390,6 +390,45 @@ namespace Slic3r {
             bool has_first_vertex() const { return m_first_vertex.has_value(); }
         };
 
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+        // Helper class used to fix the z for color change, pause print and
+        // custom gcode markes
+        class OptionsZCorrector
+        {
+            Result& m_result;
+            std::optional<size_t> m_move_id;
+            std::optional<size_t> m_custom_gcode_per_print_z_id;
+
+        public:
+            explicit OptionsZCorrector(Result& result) : m_result(result) {
+            }
+
+            void set() {
+                m_move_id = m_result.moves.size() - 1;
+                m_custom_gcode_per_print_z_id = m_result.custom_gcode_per_print_z.size() - 1;
+            }
+
+            void update(float height) {
+                if (!m_move_id.has_value() || !m_custom_gcode_per_print_z_id.has_value())
+                    return;
+
+                const Vec3f position = m_result.moves.back().position;
+
+                MoveVertex& move = m_result.moves.emplace_back(m_result.moves[m_move_id.value()]);
+                move.position = position;
+                move.height = height;
+                m_result.moves.erase(m_result.moves.begin() + m_move_id.value());
+                m_result.custom_gcode_per_print_z[m_custom_gcode_per_print_z_id.value()].print_z = position.z();
+                reset();
+            }
+
+            void reset() {
+                m_move_id.reset();
+                m_custom_gcode_per_print_z_id.reset();
+            }
+        };
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
+
 #if ENABLE_GCODE_VIEWER_DATA_CHECKING
         struct DataChecker
         {
@@ -494,6 +533,9 @@ namespace Slic3r {
         CpColor m_cp_color;
         bool m_use_volumetric_e;
         SeamsDetector m_seams_detector;
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+        OptionsZCorrector m_options_z_corrector;
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
 #if ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
         size_t m_last_default_color_id;
 #endif // ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER
diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp
index 6132430f1..adcde5572 100644
--- a/src/libslic3r/Technologies.hpp
+++ b/src/libslic3r/Technologies.hpp
@@ -57,4 +57,13 @@
 #define ENABLE_SAVE_COMMANDS_ALWAYS_ENABLED (1 && ENABLE_2_4_0_ALPHA0)
 
 
+//====================
+// 2.4.0.alpha2 techs
+//====================
+#define ENABLE_2_4_0_ALPHA2 1
+
+// Enable fixing the z position of color change, pause print and custom gcode markers in preview
+#define ENABLE_FIX_PREVIEW_OPTIONS_Z (1 && ENABLE_SEAMS_USING_MODELS && ENABLE_FIX_IMPORTING_COLOR_PRINT_VIEW_INTO_GCODEVIEWER && ENABLE_2_4_0_ALPHA2)
+
+
 #endif // _prusaslicer_technologies_h_
diff --git a/src/slic3r/GUI/GCodeViewer.cpp b/src/slic3r/GUI/GCodeViewer.cpp
index 946cbb275..9b4e2ef8d 100644
--- a/src/slic3r/GUI/GCodeViewer.cpp
+++ b/src/slic3r/GUI/GCodeViewer.cpp
@@ -2370,7 +2370,11 @@ void GCodeViewer::refresh_render_paths(bool keep_sequential_current_first, bool
         if (m_sequential_view.current.first <= buffer.model.instances.s_ids.back() && buffer.model.instances.s_ids.front() <= m_sequential_view.current.last) {
             for (size_t id : buffer.model.instances.s_ids) {
                 if (has_second_range) {
+#if ENABLE_FIX_PREVIEW_OPTIONS_Z
+                    if (id < m_sequential_view.endpoints.first) {
+#else
                     if (id <= m_sequential_view.endpoints.first) {
+#endif // ENABLE_FIX_PREVIEW_OPTIONS_Z
                         ++buffer.model.instances.render_ranges.ranges.front().offset;
                         if (id <= m_sequential_view.current.first)
                             ++buffer.model.instances.render_ranges.ranges.back().offset;