diff --git a/Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp b/Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp
index 3d6e22f6d3..c7b7007053 100644
--- a/Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp
+++ b/Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp
@@ -922,8 +922,7 @@ static void ee_Init() {
       if (!ee_IsPageClean(grp * PagesPerGroup + page)) {
         #ifdef EE_EMU_DEBUG
           SERIAL_ECHO_START();
-          SERIAL_ECHOPAIR("EEPROM Page ",page);
-          SERIAL_ECHOLNPAIR(" not clean on group ",grp);
+          SERIAL_ECHOLNPAIR("EEPROM Page ", page, " not clean on group ", grp);
           SERIAL_FLUSH();
         #endif
         ee_PageErase(grp * PagesPerGroup + page);
@@ -944,7 +943,7 @@ static void ee_Init() {
 
   #ifdef EE_EMU_DEBUG
     SERIAL_ECHO_START();
-    SERIAL_ECHOLNPAIR("EEPROM Active page: ",curPage);
+    SERIAL_ECHOLNPAIR("EEPROM Active page: ", curPage);
     SERIAL_FLUSH();
   #endif
 
@@ -953,8 +952,7 @@ static void ee_Init() {
     if (!ee_IsPageClean(curGroup * PagesPerGroup + page)) {
       #ifdef EE_EMU_DEBUG
         SERIAL_ECHO_START();
-        SERIAL_ECHOPAIR("EEPROM Page ",page);
-        SERIAL_ECHOLNPAIR(" not clean on active group ",curGroup);
+        SERIAL_ECHOLNPAIR("EEPROM Page ", page, " not clean on active group ", curGroup);
         SERIAL_FLUSH();
         ee_Dump(curGroup * PagesPerGroup + page, getFlashStorage(curGroup * PagesPerGroup + page));
       #endif
diff --git a/Marlin/src/Marlin.cpp b/Marlin/src/Marlin.cpp
index 8be6a345b0..0dca9879d5 100644
--- a/Marlin/src/Marlin.cpp
+++ b/Marlin/src/Marlin.cpp
@@ -962,10 +962,11 @@ void setup() {
   SERIAL_EOL();
 
   #if defined(STRING_DISTRIBUTION_DATE) && defined(STRING_CONFIG_H_AUTHOR)
-    SERIAL_ECHO_START();
-    SERIAL_ECHOPGM(MSG_CONFIGURATION_VER);
-    SERIAL_ECHOPGM(STRING_DISTRIBUTION_DATE);
-    SERIAL_ECHOLNPGM(MSG_AUTHOR STRING_CONFIG_H_AUTHOR);
+    SERIAL_ECHO_MSG(
+      MSG_CONFIGURATION_VER
+      STRING_DISTRIBUTION_DATE
+      MSG_AUTHOR STRING_CONFIG_H_AUTHOR
+    );
     SERIAL_ECHO_MSG("Compiled: " __DATE__);
   #endif
 
diff --git a/Marlin/src/feature/bedlevel/ubl/ubl.cpp b/Marlin/src/feature/bedlevel/ubl/ubl.cpp
index f41c80f88a..4cdc4721b5 100644
--- a/Marlin/src/feature/bedlevel/ubl/ubl.cpp
+++ b/Marlin/src/feature/bedlevel/ubl/ubl.cpp
@@ -50,9 +50,8 @@
       for (uint8_t y = 0;  y < GRID_MAX_POINTS_Y; y++)
         if (!isnan(z_values[x][y])) {
           SERIAL_ECHO_START();
-          SERIAL_ECHOPAIR("  M421 I", x, " J", y);
-          SERIAL_ECHOPAIR_F(" Z", z_values[x][y], 4);
-          SERIAL_EOL();
+          SERIAL_ECHOPAIR("  M421 I", int(x), " J", int(y));
+          SERIAL_ECHOLNPAIR_F(" Z", z_values[x][y], 4);
           serial_delay(75); // Prevent Printrun from exploding
         }
   }
diff --git a/Marlin/src/feature/prusa_MMU2/mmu2.cpp b/Marlin/src/feature/prusa_MMU2/mmu2.cpp
index 604138896d..8f5537ba9c 100644
--- a/Marlin/src/feature/prusa_MMU2/mmu2.cpp
+++ b/Marlin/src/feature/prusa_MMU2/mmu2.cpp
@@ -432,9 +432,7 @@ bool MMU2::rx_ok() {
  */
 void MMU2::check_version() {
   if (buildnr < MMU_REQUIRED_FW_BUILDNR) {
-    SERIAL_ERROR_START();
-    SERIAL_ECHOPGM("MMU2 firmware version invalid. Required version >= ");
-    SERIAL_ECHOLN(MMU_REQUIRED_FW_BUILDNR);
+    SERIAL_ERROR_MSG("Invalid MMU2 firmware. Version >= " STRINGIFY(MMU_REQUIRED_FW_BUILDNR) " required.");
     kill(MSG_MMU2_WRONG_FIRMWARE);
   }
 }
diff --git a/Marlin/src/gcode/bedlevel/M420.cpp b/Marlin/src/gcode/bedlevel/M420.cpp
index 311619acc2..d3d94a99cc 100644
--- a/Marlin/src/gcode/bedlevel/M420.cpp
+++ b/Marlin/src/gcode/bedlevel/M420.cpp
@@ -127,7 +127,7 @@ void GcodeSuite::M420() {
     }
 
     // L or V display the map info
-    if (parser.seen('L') || parser.seen('V')) {
+    if (parser.seen("LV")) {
       ubl.display_map(parser.byteval('T'));
       SERIAL_ECHOPGM("Mesh is ");
       if (!ubl.mesh_is_valid()) SERIAL_ECHOPGM("in");
diff --git a/Marlin/src/gcode/config/M281.cpp b/Marlin/src/gcode/config/M281.cpp
index ea9c032cf0..a694cb2df4 100644
--- a/Marlin/src/gcode/config/M281.cpp
+++ b/Marlin/src/gcode/config/M281.cpp
@@ -41,15 +41,14 @@ void GcodeSuite::M281() {
     }
     if (!angle_change) {
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR(" Servo ", servo_index);
-      SERIAL_ECHOPAIR(" L", servo_angles[servo_index][0]);
-      SERIAL_ECHOLNPAIR(" U", servo_angles[servo_index][1]);
+      SERIAL_ECHOLNPAIR(" Servo ", servo_index,
+                        " L", servo_angles[servo_index][0],
+                        " U", servo_angles[servo_index][1]);
     }
   }
   else {
     SERIAL_ERROR_START();
-    SERIAL_ECHOPAIR("Servo ", servo_index);
-    SERIAL_ECHOLNPGM(" out of range");
+    SERIAL_ECHOLNPAIR("Servo ", servo_index, " out of range");
   }
 }
 
diff --git a/Marlin/src/gcode/config/M301.cpp b/Marlin/src/gcode/config/M301.cpp
index 6c66ab48cb..25a15d7728 100644
--- a/Marlin/src/gcode/config/M301.cpp
+++ b/Marlin/src/gcode/config/M301.cpp
@@ -61,9 +61,9 @@ void GcodeSuite::M301() {
     #if ENABLED(PID_PARAMS_PER_HOTEND)
       SERIAL_ECHOPAIR(" e:", e); // specify extruder in serial output
     #endif // PID_PARAMS_PER_HOTEND
-    SERIAL_ECHOPAIR(" p:", PID_PARAM(Kp, e));
-    SERIAL_ECHOPAIR(" i:", unscalePID_i(PID_PARAM(Ki, e)));
-    SERIAL_ECHOPAIR(" d:", unscalePID_d(PID_PARAM(Kd, e)));
+    SERIAL_ECHOPAIR(" p:", PID_PARAM(Kp, e),
+                    " i:", unscalePID_i(PID_PARAM(Ki, e)),
+                    " d:", unscalePID_d(PID_PARAM(Kd, e)));
     #if ENABLED(PID_EXTRUSION_SCALING)
       //Kc does not have scaling applied above, or in resetting defaults
       SERIAL_ECHOPAIR(" c:", PID_PARAM(Kc, e));
diff --git a/Marlin/src/gcode/config/M302.cpp b/Marlin/src/gcode/config/M302.cpp
index e5ca1d3608..891f3c8258 100644
--- a/Marlin/src/gcode/config/M302.cpp
+++ b/Marlin/src/gcode/config/M302.cpp
@@ -56,8 +56,7 @@ void GcodeSuite::M302() {
     SERIAL_ECHO_START();
     SERIAL_ECHOPGM("Cold extrudes are ");
     serialprintPGM(thermalManager.allow_cold_extrude ? PSTR("en") : PSTR("dis"));
-    SERIAL_ECHOPAIR("abled (min temp ", thermalManager.extrude_min_temp);
-    SERIAL_ECHOLNPGM("C)");
+    SERIAL_ECHOLNPAIR("abled (min temp ", thermalManager.extrude_min_temp, "C)");
   }
 }
 
diff --git a/Marlin/src/gcode/config/M304.cpp b/Marlin/src/gcode/config/M304.cpp
index f63fa03fce..3048c228d5 100644
--- a/Marlin/src/gcode/config/M304.cpp
+++ b/Marlin/src/gcode/config/M304.cpp
@@ -33,9 +33,9 @@ void GcodeSuite::M304() {
   if (parser.seen('D')) thermalManager.temp_bed.pid.Kd = scalePID_d(parser.value_float());
 
   SERIAL_ECHO_START();
-  SERIAL_ECHOPAIR(" p:", thermalManager.temp_bed.pid.Kp);
-  SERIAL_ECHOPAIR(" i:", unscalePID_i(thermalManager.temp_bed.pid.Ki));
-  SERIAL_ECHOLNPAIR(" d:", unscalePID_d(thermalManager.temp_bed.pid.Kd));
+  SERIAL_ECHOLNPAIR(" p:", thermalManager.temp_bed.pid.Kp,
+                    " i:", unscalePID_i(thermalManager.temp_bed.pid.Ki),
+                    " d:", unscalePID_d(thermalManager.temp_bed.pid.Kd));
 }
 
 #endif // PIDTEMPBED
diff --git a/Marlin/src/gcode/config/M92.cpp b/Marlin/src/gcode/config/M92.cpp
index 3965136e6b..f0e27e82d1 100644
--- a/Marlin/src/gcode/config/M92.cpp
+++ b/Marlin/src/gcode/config/M92.cpp
@@ -25,9 +25,9 @@
 
 void report_M92(const bool echo=true, const int8_t e=-1) {
   if (echo) SERIAL_ECHO_START(); else SERIAL_CHAR(' ');
-  SERIAL_ECHOPAIR(" M92 X", LINEAR_UNIT(planner.settings.axis_steps_per_mm[X_AXIS]));
-  SERIAL_ECHOPAIR(" Y", LINEAR_UNIT(planner.settings.axis_steps_per_mm[Y_AXIS]));
-  SERIAL_ECHOPAIR(" Z", LINEAR_UNIT(planner.settings.axis_steps_per_mm[Z_AXIS]));
+  SERIAL_ECHOPAIR(" M92 X", LINEAR_UNIT(planner.settings.axis_steps_per_mm[X_AXIS]),
+                  " Y", LINEAR_UNIT(planner.settings.axis_steps_per_mm[Y_AXIS]),
+                  " Z", LINEAR_UNIT(planner.settings.axis_steps_per_mm[Z_AXIS]));
   #if DISABLED(DISTINCT_E_FACTORS)
     SERIAL_ECHOPAIR(" E", VOLUMETRIC_UNIT(planner.settings.axis_steps_per_mm[E_AXIS]));
   #endif
@@ -37,8 +37,8 @@ void report_M92(const bool echo=true, const int8_t e=-1) {
     for (uint8_t i = 0; i < E_STEPPERS; i++) {
       if (e >= 0 && i != e) continue;
       if (echo) SERIAL_ECHO_START(); else SERIAL_CHAR(' ');
-      SERIAL_ECHOPAIR(" M92 T", (int)i);
-      SERIAL_ECHOLNPAIR(" E", VOLUMETRIC_UNIT(planner.settings.axis_steps_per_mm[E_AXIS_N(i)]));
+      SERIAL_ECHOLNPAIR(" M92 T", (int)i,
+                        " E", VOLUMETRIC_UNIT(planner.settings.axis_steps_per_mm[E_AXIS_N(i)]));
     }
   #endif
 
@@ -101,12 +101,10 @@ void GcodeSuite::M92() {
                      micro_steps = argH ? argH : Z_MICROSTEPS;
       const float z_full_step_mm = micro_steps * planner.steps_to_mm[Z_AXIS];
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR("{ micro_steps:", micro_steps);
-      SERIAL_ECHOPAIR(", z_full_step_mm:", z_full_step_mm);
+      SERIAL_ECHOPAIR("{ micro_steps:", micro_steps, ", z_full_step_mm:", z_full_step_mm);
       if (wanted) {
         const float best = uint16_t(wanted / z_full_step_mm) * z_full_step_mm;
-        SERIAL_ECHOPGM(", best:[");
-        SERIAL_ECHO(best);
+        SERIAL_ECHOPAIR(", best:[", best);
         if (best != wanted) { SERIAL_CHAR(','); SERIAL_ECHO(best + z_full_step_mm); }
         SERIAL_CHAR(']');
       }
diff --git a/Marlin/src/gcode/control/M280.cpp b/Marlin/src/gcode/control/M280.cpp
index 3626f0bf67..6b65e9b753 100644
--- a/Marlin/src/gcode/control/M280.cpp
+++ b/Marlin/src/gcode/control/M280.cpp
@@ -43,14 +43,12 @@ void GcodeSuite::M280() {
     }
     else {
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR(" Servo ", servo_index);
-      SERIAL_ECHOLNPAIR(": ", servo[servo_index].read());
+      SERIAL_ECHOLNPAIR(" Servo ", servo_index, ": ", servo[servo_index].read());
     }
   }
   else {
     SERIAL_ERROR_START();
-    SERIAL_ECHOPAIR("Servo ", servo_index);
-    SERIAL_ECHOLNPGM(" out of range");
+    SERIAL_ECHOLNPAIR("Servo ", servo_index, " out of range");
   }
 }
 
diff --git a/Marlin/src/gcode/feature/L6470/M906.cpp b/Marlin/src/gcode/feature/L6470/M906.cpp
index 7f48033190..143a6fea8d 100644
--- a/Marlin/src/gcode/feature/L6470/M906.cpp
+++ b/Marlin/src/gcode/feature/L6470/M906.cpp
@@ -151,7 +151,7 @@ void L6470_report_current(L6470 &motor, const uint8_t axis) {
       break;
   }
   SERIAL_ECHO(dtostrf(val * 100 / 256, 10, 2, numstr));
-  SERIAL_ECHO("%% ");
+  SERIAL_ECHOPGM("%% ");
   serialprintPGM(suf);
   SERIAL_EOL();
 }
diff --git a/Marlin/src/gcode/feature/advance/M900.cpp b/Marlin/src/gcode/feature/advance/M900.cpp
index a5c0dc5cd7..f030511422 100644
--- a/Marlin/src/gcode/feature/advance/M900.cpp
+++ b/Marlin/src/gcode/feature/advance/M900.cpp
@@ -99,13 +99,13 @@ void GcodeSuite::M900() {
 
     if (!parser.seen_any()) {
       #if EXTRUDERS < 2
-        SERIAL_ECHOLNPAIR("Advance S", ext_slot, " K", planner.extruder_advance_K[0]);
-        SERIAL_ECHOLNPAIR("(Slot ", 1 - ext_slot, " K", saved_extruder_advance_K[0], ")");
+        SERIAL_ECHOLNPAIR("Advance S", ext_slot, " K", planner.extruder_advance_K[0],
+                          "(Slot ", 1 - ext_slot, " K", saved_extruder_advance_K[0], ")");
       #else
         LOOP_L_N(i, EXTRUDERS) {
           const int slot = (int)TEST(lin_adv_slot, i);
-          SERIAL_ECHOLNPAIR("Advance T", int(i), " S", slot, " K", planner.extruder_advance_K[i]);
-          SERIAL_ECHOLNPAIR("(Slot ", 1 - slot, " K", saved_extruder_advance_K[i], ")");
+          SERIAL_ECHOLNPAIR("Advance T", int(i), " S", slot, " K", planner.extruder_advance_K[i],
+                            "(Slot ", 1 - slot, " K", saved_extruder_advance_K[i], ")");
           SERIAL_EOL();
         }
       #endif
diff --git a/Marlin/src/gcode/feature/powerloss/M413.cpp b/Marlin/src/gcode/feature/powerloss/M413.cpp
index 49f4c250af..cd1dd801b9 100644
--- a/Marlin/src/gcode/feature/powerloss/M413.cpp
+++ b/Marlin/src/gcode/feature/powerloss/M413.cpp
@@ -47,7 +47,7 @@ void GcodeSuite::M413() {
   }
 
   #if ENABLED(DEBUG_POWER_LOSS_RECOVERY)
-    if (parser.seen('R') || parser.seen('L')) recovery.load();
+    if (parser.seen("RL")) recovery.load();
     if (parser.seen('W')) recovery.save(true);
     if (parser.seen('P')) recovery.purge();
     if (parser.seen('E')) serialprintPGM(recovery.exists() ? PSTR("PLR Exists\n") : PSTR("No PLR\n"));
diff --git a/Marlin/src/gcode/probe/M951.cpp b/Marlin/src/gcode/probe/M951.cpp
index 3e27a7397f..d8d2e8f8e0 100644
--- a/Marlin/src/gcode/probe/M951.cpp
+++ b/Marlin/src/gcode/probe/M951.cpp
@@ -28,11 +28,10 @@
 #include "../../module/tool_change.h"
 #include "../../module/motion.h"
 
-
 mpe_settings_t mpe_settings;
 
 inline void mpe_settings_report() {
-  SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("Magnetic Parking Extruder");
+  SERIAL_ECHO_MSG("Magnetic Parking Extruder");
   SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("L: Left parking  :", mpe_settings.parking_xpos[0]);
   SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("R: Right parking :", mpe_settings.parking_xpos[1]);
   SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("I: Grab Offset   :", mpe_settings.grab_distance);
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/archim2-flash/flash_storage.cpp b/Marlin/src/lcd/extensible_ui/lib/lulzbot/archim2-flash/flash_storage.cpp
index 2e17c6492c..360f2562a1 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/archim2-flash/flash_storage.cpp
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/archim2-flash/flash_storage.cpp
@@ -178,7 +178,7 @@ bool UIFlashStorage::is_present = false;
         ((manufacturer_id == 0x1F) && (device_type == 0x86) && (capacity == 0x01)) ;  // Adesto AT255F161
 
     if (!is_known) {
-      SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("Unable to locate supported SPI Flash Memory.");
+      SERIAL_ECHO_MSG("Unable to locate supported SPI Flash Memory.");
       SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("  Manufacturer ID, got: ", manufacturer_id);
       SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("  Device Type    , got: ", device_type);
       SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("  Capacity       , got: ", capacity);
@@ -252,7 +252,7 @@ bool UIFlashStorage::is_present = false;
           return -1;
       }
     }
-    SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("No LULZ delimiter found.");
+    SERIAL_ECHO_MSG("No LULZ delimiter found.");
     return -1;
   }
 
@@ -264,7 +264,7 @@ bool UIFlashStorage::is_present = false;
 
     int32_t write_offset = read_offset + 4 + block_size;
     if ((write_offset + 4 + block_size) > data_storage_area_size) {
-      SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("Not enough free space in Flash.");
+      SERIAL_ECHO_MSG("Not enough free space in Flash.");
       return -1; // Not enough free space
     }
     return write_offset;
@@ -300,7 +300,7 @@ bool UIFlashStorage::is_present = false;
 
   void UIFlashStorage::write_config_data(const void *data, size_t size) {
     if (!is_present) {
-      SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("SPI Flash chip not present. Not saving UI settings.");
+      SERIAL_ECHO_MSG("SPI Flash chip not present. Not saving UI settings.");
       return;
     }
 
@@ -308,7 +308,7 @@ bool UIFlashStorage::is_present = false;
     // make sure that the data is different before rewriting.
 
     if (verify_config_data(data, size)) {
-      SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("UI settings already written, skipping write.");
+      SERIAL_ECHO_MSG("UI settings already written, skipping write.");
       return;
     }
 
@@ -427,12 +427,12 @@ bool UIFlashStorage::is_present = false;
 
       MediaFileReader reader;
       if (!reader.open((char*) buff)) {
-        SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("Unable to find media file");
+        SERIAL_ECHO_MSG("Unable to find media file");
         return FILE_NOT_FOUND;
       }
 
       if (get_media_file_size(slot) != 0xFFFFFFFFUL) {
-        SERIAL_ECHO_START(); SERIAL_ECHOLNPGM("Media file already exists");
+        SERIAL_ECHO_MSG("Media file already exists");
         return WOULD_OVERWRITE;
       }
 
@@ -518,9 +518,8 @@ bool UIFlashStorage::is_present = false;
       SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR("Boot media file size:", bytes_remaining);
       addr = get_media_file_start(slot);
       return true;
-    } else {
-      return false;
     }
+    return false;
   }
 
   int16_t UIFlashStorage::BootMediaReader::read(void *data, const size_t size) {
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/commands.cpp b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/commands.cpp
index 87486a07d4..9a04c9e835 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/commands.cpp
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/commands.cpp
@@ -923,8 +923,7 @@ template <class T> bool CLCD::CommandFifo::_write_unaligned(T data, uint16_t len
 
   #if ENABLED(TOUCH_UI_DEBUG)
   if (command_write_ptr == 0xFFFFFFFFul) {
-    SERIAL_ECHO_START();
-    SERIAL_ECHOLNPGM("Attempt to write to FIFO before CommandFifo::Cmd_Start().");
+    SERIAL_ECHO_MSG("Attempt to write to FIFO before CommandFifo::Cmd_Start().");
   }
   #endif
 
@@ -1016,8 +1015,8 @@ template <class T> bool CLCD::CommandFifo::write(T data, uint16_t len) {
   if (Command_Space < (len + padding)) {
     #if ENABLED(TOUCH_UI_DEBUG)
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR("Waiting for ", len + padding);
-      SERIAL_ECHOPAIR(" bytes in command queue, now free: ", Command_Space);
+      SERIAL_ECHOPAIR("Waiting for ", len + padding,
+                      " bytes in command queue, now free: ", Command_Space);
     #endif
     do {
       Command_Space = mem_read_32(REG::CMDB_SPACE) & 0x0FFF;
@@ -1071,8 +1070,7 @@ void CLCD::init() {
    uint8_t device_id = mem_read_8(REG::ID);            // Read Device ID, Should Be 0x7C;
    if (device_id == 0x7c) {
      #if ENABLED(TOUCH_UI_DEBUG)
-       SERIAL_ECHO_START();
-       SERIAL_ECHOLNPGM("FTDI chip initialized ");
+       SERIAL_ECHO_MSG("FTDI chip initialized ");
      #endif
      break;
    }
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/constants.h b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/constants.h
index 54836e1466..5f60881bdd 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/constants.h
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/basic/constants.h
@@ -148,7 +148,7 @@ namespace FTDI {
   constexpr uint8_t STENCIL_OP_DECR                    = 4;
   constexpr uint8_t STENCIL_OP_INVERT                  = 5;
 
-  typedef enum: uint32_t {
+  typedef enum : uint32_t {
    BITMAPS                                             = 1,
    POINTS                                              = 2,
    LINES                                               = 3,
@@ -281,7 +281,7 @@ namespace FTDI_FT810 {
 }
 
 namespace FTDI {
-  enum effect_t {
+  enum effect_t : unsigned char {
     SILENCE                                         = 0x00,
     SQUARE_WAVE                                     = 0x01,
     SINE_WAVE                                       = 0x02,
@@ -342,7 +342,7 @@ namespace FTDI {
     UNMUTE                                          = 0x61
   };
 
-  enum note_t {
+  enum note_t : unsigned char {
     END_SONG                                        = 0xFF,
     REST                                            = 0x00,
 
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/dl_cache.cpp b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/dl_cache.cpp
index b4018e979e..bf8ca61f3a 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/dl_cache.cpp
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/dl_cache.cpp
@@ -78,8 +78,7 @@ bool DLCache::wait_until_idle() {
   const unsigned long startTime = millis();
   do {
     if ((millis() - startTime) > 250) {
-      SERIAL_ECHO_START();
-      SERIAL_ECHOLNPGM("Timeout on DL_Cache::Wait_Until_Idle()");
+      SERIAL_ECHO_MSG("Timeout on DL_Cache::Wait_Until_Idle()");
       CLCD::CommandFifo::reset();
       return false;
     }
@@ -130,15 +129,15 @@ bool DLCache::store(uint32_t num_bytes /* = 0*/) {
     // Not enough memory to cache the display list.
     #if ENABLED(TOUCH_UI_DEBUG)
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR("Not enough space in GRAM to cache display list, free space: ", free_space);
-      SERIAL_ECHOLNPAIR(" Required: ", dl_size);
+      SERIAL_ECHOLNPAIR("Not enough space in GRAM to cache display list, free space: ", free_space,
+                        " Required: ", dl_size);
     #endif
     return false;
   } else {
     #if ENABLED(TOUCH_UI_DEBUG)
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR("Saving DL to RAMG cache, bytes: ", dl_size);
-      SERIAL_ECHOLNPAIR(" Free space: ", free_space);
+      SERIAL_ECHOLNPAIR("Saving DL to RAMG cache, bytes: ", dl_size,
+                        " Free space: ", free_space);
     #endif
     cmd.memcpy(dl_addr, MAP::RAM_DL, dl_size);
     cmd.execute();
@@ -168,8 +167,8 @@ void DLCache::append() {
     cmd.execute();
     wait_until_idle();
     SERIAL_ECHO_START();
-    SERIAL_ECHOPAIR("Appending to DL from RAMG cache, bytes: ", dl_size);
-    SERIAL_ECHOLNPAIR(" REG_CMD_DL: ", CLCD::mem_read_32(REG::CMD_DL));
+    SERIAL_ECHOLNPAIR("Appending to DL from RAMG cache, bytes: ", dl_size,
+                      " REG_CMD_DL: ", CLCD::mem_read_32(REG::CMD_DL));
   #endif
 }
 
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/screen_types.h b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/screen_types.h
index e42ff41d67..f1ec4fc476 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/screen_types.h
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/screen_types.h
@@ -176,8 +176,7 @@ class CachedScreen {
     static bool storeBackground() {
       DLCache dlcache(DL_SLOT);
       if (!dlcache.store(DL_SIZE)) {
-        SERIAL_ECHO_START();
-        SERIAL_ECHOLNPGM("CachedScreen::storeBackground() failed: not enough DL cache space");
+        SERIAL_ECHO_MSG("CachedScreen::storeBackground() failed: not enough DL cache space");
         return false;
       }
       return true;
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/sound_player.cpp b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/sound_player.cpp
index a58bdda738..0011d69118 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/sound_player.cpp
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/ftdi_eve_lib/extended/sound_player.cpp
@@ -38,8 +38,7 @@ namespace FTDI {
 
     #if ENABLED(TOUCH_UI_DEBUG)
       SERIAL_ECHO_START();
-      SERIAL_ECHOPAIR("Playing note ", note);
-      SERIAL_ECHOLNPAIR(", instrument ", effect);
+      SERIAL_ECHOLNPAIR("Playing note ", int(note), ", instrument ", int(effect));
     #endif
 
     // Play the note
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/media_player_screen.cpp b/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/media_player_screen.cpp
index 6655e4311a..1043dde9c7 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/media_player_screen.cpp
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/media_player_screen.cpp
@@ -66,8 +66,7 @@ bool MediaPlayerScreen::playCardMedia() {
     if (!reader.open(fname))
       return false;
 
-    SERIAL_ECHO_START();
-    SERIAL_ECHOLNPGM("Starting to play STARTUP.AVI");
+    SERIAL_ECHO_MSG("Starting to play STARTUP.AVI");
     playStream(&reader, MediaFileReader::read);
     reader.close();
   #endif
@@ -79,8 +78,7 @@ bool MediaPlayerScreen::playBootMedia() {
   UIFlashStorage::BootMediaReader reader;
   if (!reader.isAvailable()) return false;
 
-  SERIAL_ECHO_START();
-  SERIAL_ECHOLNPGM("Starting to play boot video");
+  SERIAL_ECHO_MSG("Starting to play boot video");
   playStream(&reader, UIFlashStorage::BootMediaReader::read);
   return true;
 }
@@ -138,8 +136,7 @@ void MediaPlayerScreen::playStream(void *obj, media_streamer_func_t *data_stream
             t = millis();
             timeouts--;
             if (timeouts == 0) {
-              SERIAL_ECHO_START();
-              SERIAL_ECHOLNPGM("Timeout playing video");
+              SERIAL_ECHO_MSG("Timeout playing video");
               cmd.reset();
               goto exit;
             }
@@ -151,8 +148,7 @@ void MediaPlayerScreen::playStream(void *obj, media_streamer_func_t *data_stream
         CLCD::mem_write_32(CLCD::REG::MEDIAFIFO_WRITE, writePtr);
       } while (nBytes == block_size);
 
-      SERIAL_ECHO_START();
-      SERIAL_ECHOLNPGM("Done playing video");
+      SERIAL_ECHO_MSG("Done playing video");
 
     exit:
       spiInit(SPI_SPEED); // Restore default speed
diff --git a/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/touch_calibration_screen.cpp b/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/touch_calibration_screen.cpp
index 4effca9fed..0779bb6fb2 100644
--- a/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/touch_calibration_screen.cpp
+++ b/Marlin/src/lcd/extensible_ui/lib/lulzbot/screens/touch_calibration_screen.cpp
@@ -52,8 +52,7 @@ void TouchCalibrationScreen::onEntry() {
 
     while (CLCD::is_touching()) {
       #if ENABLED(TOUCH_UI_DEBUG)
-        SERIAL_ECHO_START();
-        SERIAL_ECHOLNPGM("Waiting for touch release");
+        SERIAL_ECHO_MSG("Waiting for touch release");
       #endif
     }
   }
diff --git a/Marlin/src/sd/cardreader.cpp b/Marlin/src/sd/cardreader.cpp
index 41cc167394..98a03af168 100644
--- a/Marlin/src/sd/cardreader.cpp
+++ b/Marlin/src/sd/cardreader.cpp
@@ -192,8 +192,7 @@ void CardReader::lsDive(const char *prepend, SdFile parent, const char * const m
       if (!dir.open(&parent, dosFilename, O_READ)) {
         if (lsAction == LS_SerialPrint) {
           SERIAL_ECHO_START();
-          SERIAL_ECHOPGM(MSG_SD_CANT_OPEN_SUBDIR);
-          SERIAL_ECHOLN(dosFilename);
+          SERIAL_ECHOLNPAIR(MSG_SD_CANT_OPEN_SUBDIR, dosFilename);
         }
       }
       lsDive(path, dir);
@@ -292,8 +291,7 @@ void CardReader::ls() {
       if (!dir.open(&diveDir, segment, O_READ)) {
         SERIAL_EOL();
         SERIAL_ECHO_START();
-        SERIAL_ECHOPGM(MSG_SD_CANT_OPEN_SUBDIR);
-        SERIAL_ECHO(segment);
+        SERIAL_ECHOPAIR(MSG_SD_CANT_OPEN_SUBDIR, segment);
         break;
       }