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diff --git a/Marlin/src/module/tool_change.h b/Marlin/src/module/tool_change.h
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include "../inc/MarlinConfigPre.h"
+#include "../core/types.h"
+
+//#define DEBUG_TOOLCHANGE_MIGRATION_FEATURE
+
+#if HAS_MULTI_EXTRUDER
+
+  typedef struct {
+    #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)
+      float swap_length, extra_prime, extra_resume;
+      int16_t prime_speed, retract_speed, unretract_speed, fan, fan_speed, fan_time;
+    #endif
+    #if ENABLED(TOOLCHANGE_PARK)
+      bool enable_park;
+      xy_pos_t change_point;
+    #endif
+    float z_raise;
+  } toolchange_settings_t;
+
+  extern toolchange_settings_t toolchange_settings;
+
+  #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)
+    extern void tool_change_prime();
+  #endif
+
+  #if ENABLED(TOOLCHANGE_FS_PRIME_FIRST_USED)
+    extern bool enable_first_prime;
+  #endif
+
+  #if ENABLED(TOOLCHANGE_FS_INIT_BEFORE_SWAP)
+    extern bool toolchange_extruder_ready[EXTRUDERS];
+  #endif
+
+  #if ENABLED(TOOLCHANGE_MIGRATION_FEATURE)
+    typedef struct {
+      uint8_t target, last;
+      bool automode, in_progress;
+    } migration_settings_t;
+    constexpr migration_settings_t migration_defaults = { 0, 0, false, false };
+    extern migration_settings_t migration;
+    bool extruder_migration();
+  #endif
+#endif
+
+#if DO_SWITCH_EXTRUDER
+  void move_extruder_servo(const uint8_t e);
+#endif
+
+#if ENABLED(SWITCHING_NOZZLE)
+  #if SWITCHING_NOZZLE_TWO_SERVOS
+    void lower_nozzle(const uint8_t e);
+    void raise_nozzle(const uint8_t e);
+  #else
+    void move_nozzle_servo(const uint8_t angle_index);
+  #endif
+#endif
+
+#if ENABLED(PARKING_EXTRUDER)
+
+  #if ENABLED(PARKING_EXTRUDER_SOLENOIDS_INVERT)
+    #define PE_MAGNET_ON_STATE !PARKING_EXTRUDER_SOLENOIDS_PINS_ACTIVE
+  #else
+    #define PE_MAGNET_ON_STATE PARKING_EXTRUDER_SOLENOIDS_PINS_ACTIVE
+  #endif
+
+  void pe_solenoid_set_pin_state(const uint8_t extruder_num, const uint8_t state);
+
+  inline void pe_solenoid_magnet_on(const uint8_t extruder_num)  { pe_solenoid_set_pin_state(extruder_num,  PE_MAGNET_ON_STATE); }
+  inline void pe_solenoid_magnet_off(const uint8_t extruder_num) { pe_solenoid_set_pin_state(extruder_num, !PE_MAGNET_ON_STATE); }
+
+  void pe_solenoid_init();
+
+  extern bool extruder_parked;
+  inline void parking_extruder_set_parked(const bool parked) { extruder_parked = parked; }
+  bool parking_extruder_unpark_after_homing(const uint8_t final_tool, bool homed_towards_final_tool);
+
+#elif ENABLED(MAGNETIC_PARKING_EXTRUDER)
+
+  typedef struct MPESettings {
+      float parking_xpos[2],      // M951 L R
+            grab_distance;        // M951 I
+ feedRate_t slow_feedrate,        // M951 J
+            fast_feedrate;        // M951 H
+      float travel_distance,      // M951 D
+            compensation_factor;  // M951 C
+  } mpe_settings_t;
+
+  extern mpe_settings_t mpe_settings;
+
+  void mpe_settings_init();
+
+#endif
+
+TERN_(ELECTROMAGNETIC_SWITCHING_TOOLHEAD, void est_init());
+
+TERN_(SWITCHING_TOOLHEAD, void swt_init());
+
+/**
+ * Perform a tool-change, which may result in moving the
+ * previous tool out of the way and the new tool into place.
+ */
+void tool_change(const uint8_t tmp_extruder, bool no_move=false);