diff --git a/Marlin/src/HAL/STM32/tft/tft_ltdc.cpp b/Marlin/src/HAL/STM32/tft/tft_ltdc.cpp
index 66cfd65995..95871bf41f 100644
--- a/Marlin/src/HAL/STM32/tft/tft_ltdc.cpp
+++ b/Marlin/src/HAL/STM32/tft/tft_ltdc.cpp
@@ -372,9 +372,9 @@ void TFT_LTDC::TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Cou
     if (MemoryIncrease == DMA_PINC_ENABLE) {
       DrawImage(x_min, y_cur, x_min + width, y_cur + height, Data);
       Data += width * height;
-    } else {
-      DrawRect(x_min, y_cur, x_min + width, y_cur + height, *Data);
     }
+    else
+      DrawRect(x_min, y_cur, x_min + width, y_cur + height, *Data);
     y_cur += height;
   }
 
diff --git a/Marlin/src/feature/direct_stepping.cpp b/Marlin/src/feature/direct_stepping.cpp
index 052e79de41..13cf71e076 100644
--- a/Marlin/src/feature/direct_stepping.cpp
+++ b/Marlin/src/feature/direct_stepping.cpp
@@ -143,14 +143,16 @@ namespace DirectStepping {
           // special case for 8-bit, check if rolled back to 0
           if (Cfg::DIRECTIONAL || !write_page_size) { // full 256 bytes
             if (write_byte_idx) return true;
-          } else {
-            if (write_byte_idx < write_page_size) return true;
           }
-        } else if (Cfg::DIRECTIONAL) {
-          if (write_byte_idx != Cfg::PAGE_SIZE) return true;
-        } else {
-          if (write_byte_idx < write_page_size) return true;
+          else if (write_byte_idx < write_page_size)
+            return true;
+        }
+        else if (Cfg::DIRECTIONAL) {
+          if (write_byte_idx != Cfg::PAGE_SIZE)
+            return true;
         }
+        else if (write_byte_idx < write_page_size)
+          return true;
 
         state = State::CHECKSUM;
         return true;
@@ -161,11 +163,10 @@ namespace DirectStepping {
         return true;
       }
       case State::UNFAIL:
-        if (c == 0) {
+        if (c == 0)
           set_page_state(write_page_idx, PageState::FREE);
-        } else {
+        else
           fatal_error = true;
-        }
         state = State::MONITOR;
         return true;
     }
diff --git a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/change_filament_screen.cpp b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/change_filament_screen.cpp
index fa0748c17b..17ec975692 100644
--- a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/change_filament_screen.cpp
+++ b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/change_filament_screen.cpp
@@ -171,9 +171,9 @@ void ChangeFilamentScreen::onRedraw(draw_mode_t what) {
 
     const bool t_ok = getActualTemp_celsius(e) > getSoftenTemp() - 10;
 
-    if (mydata.t_tag && !t_ok) {
+    if (mydata.t_tag && !t_ok)
       cmd.text(HEATING_LBL_POS, GET_TEXT_F(MSG_HEATING));
-    } else if (getActualTemp_celsius(e) > 100) {
+    else if (getActualTemp_celsius(e) > 100) {
       cmd.cmd(COLOR_RGB(0xFF0000))
          .text(CAUTION_LBL_POS, GET_TEXT_F(MSG_CAUTION))
          .colors(normal_btn)
diff --git a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/files_screen.cpp b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/files_screen.cpp
index 00768dbaf7..290c20f43e 100644
--- a/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/files_screen.cpp
+++ b/Marlin/src/lcd/extui/ftdi_eve_touch_ui/generic/files_screen.cpp
@@ -111,16 +111,17 @@ void FilesScreen::drawFileButton(int x, int y, int w, int h, const char *filenam
   cmd.cmd(COLOR_RGB(is_highlighted ? fg_action : bg_color));
   cmd.font(font_medium).rectangle(bx, by, bw, bh);
   cmd.cmd(COLOR_RGB(is_highlighted ? normal_btn.rgb : bg_text_enabled));
-  #if ENABLED(SCROLL_LONG_FILENAMES)
-    if (is_highlighted) {
+  if (TERN0(SCROLL_LONG_FILENAMES, is_highlighted)) {
+    #if ENABLED(SCROLL_LONG_FILENAMES)
       cmd.cmd(SAVE_CONTEXT());
       cmd.cmd(SCISSOR_XY(x,y));
       cmd.cmd(SCISSOR_SIZE(w,h));
       cmd.cmd(MACRO(0));
       cmd.text(bx, by, bw, bh, filename, OPT_CENTERY | OPT_NOFIT);
-    } else
-  #endif
-  draw_text_with_ellipsis(cmd, bx,by, bw - (is_dir ? 20 : 0), bh, filename, OPT_CENTERY, font_medium);
+    #endif
+  }
+  else
+    draw_text_with_ellipsis(cmd, bx,by, bw - (is_dir ? 20 : 0), bh, filename, OPT_CENTERY, font_medium);
   if (is_dir && !is_highlighted) cmd.text(bx, by, bw, bh, F("> "),  OPT_CENTERY | OPT_RIGHTX);
   #if ENABLED(SCROLL_LONG_FILENAMES)
     if (is_highlighted) cmd.cmd(RESTORE_CONTEXT());
diff --git a/Marlin/src/lcd/extui/mks_ui/wifiSerial_STM32.cpp b/Marlin/src/lcd/extui/mks_ui/wifiSerial_STM32.cpp
index 6607e7531f..0e55b3448b 100644
--- a/Marlin/src/lcd/extui/mks_ui/wifiSerial_STM32.cpp
+++ b/Marlin/src/lcd/extui/mks_ui/wifiSerial_STM32.cpp
@@ -53,42 +53,45 @@ void WifiSerial::init(PinName _rx, PinName _tx) {
 WifiSerial::WifiSerial(void *peripheral) {
   // If PIN_SERIALy_RX is not defined assume half-duplex
   _serial.pin_rx = NC;
+  if (false) {
+    // for else if / else below...
+  }
   // If Serial is defined in variant set
   // the Rx/Tx pins for com port if defined
   #if defined(Serial) && defined(PIN_SERIAL_TX)
-    if ((void *)this == (void *)&Serial) {
+    else if ((void *)this == (void *)&Serial) {
       #ifdef PIN_SERIAL_RX
         setRx(PIN_SERIAL_RX);
       #endif
       setTx(PIN_SERIAL_TX);
-    } else
+    }
   #endif
   #if defined(PIN_SERIAL1_TX) && defined(USART1_BASE)
-    if (peripheral == USART1) {
+    else if (peripheral == USART1) {
       #ifdef PIN_SERIAL1_RX
         setRx(PIN_SERIAL1_RX);
       #endif
       setTx(PIN_SERIAL1_TX);
-    } else
+    }
   #endif
   #if defined(PIN_SERIAL2_TX) && defined(USART2_BASE)
-    if (peripheral == USART2) {
+    else if (peripheral == USART2) {
       #ifdef PIN_SERIAL2_RX
         setRx(PIN_SERIAL2_RX);
       #endif
       setTx(PIN_SERIAL2_TX);
-    } else
+    }
   #endif
   #if defined(PIN_SERIAL3_TX) && defined(USART3_BASE)
-    if (peripheral == USART3) {
+    else if (peripheral == USART3) {
       #ifdef PIN_SERIAL3_RX
         setRx(PIN_SERIAL3_RX);
       #endif
       setTx(PIN_SERIAL3_TX);
-    } else
+    }
   #endif
   #ifdef PIN_SERIAL4_TX
-    if (false
+    else if (false
       #ifdef USART4_BASE
         || peripheral == USART4
       #elif defined(UART4_BASE)
@@ -99,10 +102,10 @@ WifiSerial::WifiSerial(void *peripheral) {
         setRx(PIN_SERIAL4_RX);
       #endif
       setTx(PIN_SERIAL4_TX);
-    } else
+    }
   #endif
   #ifdef PIN_SERIAL5_TX
-    if (false
+    else if (false
       #ifdef USART5_BASE
         || peripheral == USART5
       #elif defined(UART5_BASE)
@@ -113,18 +116,18 @@ WifiSerial::WifiSerial(void *peripheral) {
         setRx(PIN_SERIAL5_RX);
       #endif
       setTx(PIN_SERIAL5_TX);
-    } else
+    }
   #endif
   #if defined(PIN_SERIAL6_TX) && defined(USART6_BASE)
-    if (peripheral == USART6) {
+    else if (peripheral == USART6) {
       #ifdef PIN_SERIAL6_RX
         setRx(PIN_SERIAL6_RX);
       #endif
         setTx(PIN_SERIAL6_TX);
-    } else
+    }
   #endif
   #ifdef PIN_SERIAL7_TX
-    if (false
+    else if (false
       #ifdef USART7_BASE
         || peripheral == USART7
       #elif defined(UART7_BASE)
@@ -135,10 +138,10 @@ WifiSerial::WifiSerial(void *peripheral) {
         setRx(PIN_SERIAL7_RX);
       #endif
       setTx(PIN_SERIAL7_TX);
-    } else
+    }
   #endif
   #ifdef PIN_SERIAL8_TX
-    if (false
+    else if (false
       #ifdef USART8_BASE
         || peripheral == USART8
       #elif defined(UART8_BASE)
@@ -149,18 +152,18 @@ WifiSerial::WifiSerial(void *peripheral) {
         setRx(PIN_SERIAL8_RX);
       #endif
       setTx(PIN_SERIAL8_TX);
-    } else
+    }
   #endif
   #if defined(PIN_SERIAL9_TX) && defined(UART9_BASE)
-    if (peripheral == UART9) {
+    else if (peripheral == UART9) {
       #ifdef PIN_SERIAL9_RX
         setRx(PIN_SERIAL9_RX);
       #endif
       setTx(PIN_SERIAL9_TX);
-    } else
+    }
   #endif
   #ifdef PIN_SERIAL10_TX
-    if (false
+    else if (false
       #ifdef USART10_BASE
         || peripheral == USART10
       #elif defined(UART10_BASE)
@@ -171,18 +174,18 @@ WifiSerial::WifiSerial(void *peripheral) {
         setRx(PIN_SERIAL10_RX);
       #endif
       setTx(PIN_SERIAL10_TX);
-    } else
+    }
   #endif
   #if defined(PIN_SERIALLP1_TX) && defined(LPUART1_BASE)
-    if (peripheral == LPUART1) {
+    else if (peripheral == LPUART1) {
       #ifdef PIN_SERIALLP1_RX
         setRx(PIN_SERIALLP1_RX);
       #endif
       setTx(PIN_SERIALLP1_TX);
-    } else
+    }
   #endif
   // else get the pins of the first peripheral occurrence in PinMap
-  {
+  else {
     _serial.pin_rx = pinmap_pin(peripheral, PinMap_UART_RX);
     _serial.pin_tx = pinmap_pin(peripheral, PinMap_UART_TX);
   }