Add LCD_SET_PROGRESS_MANUALLY

Marlin/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/Marlin_main.cpp

       #if ENABLED(ULTIPANEL)
         if (lcd_detected()) {
           while (wait_for_user) idle();
-          IS_SD_PRINTING ? LCD_MESSAGEPGM(MSG_RESUMING) : LCD_MESSAGEPGM(WELCOME_MSG);
+          print_job_timer.isPaused() ? LCD_MESSAGEPGM(WELCOME_MSG) : LCD_MESSAGEPGM(MSG_RESUMING);
         }
       #else
         while (wait_for_user) idle();
 
 #endif // AUTO_BED_LEVELING_UBL && UBL_G26_MESH_VALIDATION
 
+#if ENABLED(ULTRA_LCD) && ENABLED(LCD_SET_PROGRESS_MANUALLY)
+  /**
+   * M73: Set percentage complete (for display on LCD)
+   *
+   * Example:
+   *   M73 P25 ; Set progress to 25%
+   *
+   * Notes:
+   *   This has no effect during an SD print job
+   */
+  inline void gcode_M73() {
+    if (!IS_SD_PRINTING && parser.seen('P')) {
+      progress_bar_percent = parser.value_byte();
+      NOMORE(progress_bar_percent, 100);
+    }
+  }
+#endif // ULTRA_LCD && LCD_SET_PROGRESS_MANUALLY
+
 /**
  * M75: Start print timer
  */
           break;
       #endif // AUTO_BED_LEVELING_UBL && UBL_G26_MESH_VALIDATION
 
+      #if ENABLED(ULTRA_LCD) && ENABLED(LCD_SET_PROGRESS_MANUALLY)
+        case 73: // M73: Set print progress percentage
+          gcode_M73(); break;
+      #endif
+
       case 75: // M75: Start print timer
         gcode_M75(); break;
       case 76: // M76: Pause print timer

Marlin/example_configurations/AlephObjects/TAZ4/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Anet/A6/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Anet/A8/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/BQ/Hephestos/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/BQ/WITBOX/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Cartesio/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Creality/CR-10/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Felix/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Folger Tech/i3-2020/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Infitary/i3-M508/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/RigidBot/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/SCARA/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Sanguinololu/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/TinyBoy2/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/Velleman/K8400/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/delta/FLSUN/auto_calibrate/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/delta/FLSUN/kossel_mini/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/delta/generic/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/gCreate/gMax1.5+/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/makibox/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/example_configurations/wt150/Configuration_adv.h

     //#define LCD_PROGRESS_BAR_TEST
   #endif
 
+  // Add an 'M73' G-code to set the current percentage
+  //#define LCD_SET_PROGRESS_MANUALLY
+
   // This allows hosts to request long names for files and folders with M33
   //#define LONG_FILENAME_HOST_SUPPORT
 

Marlin/ultralcd.cpp

 // Initialized by settings.load()
 int16_t lcd_preheat_hotend_temp[2], lcd_preheat_bed_temp[2], lcd_preheat_fan_speed[2];
 
+#if ENABLED(LCD_SET_PROGRESS_MANUALLY) && (ENABLED(LCD_PROGRESS_BAR) || ENABLED(DOGLCD))
+  uint8_t progress_bar_percent;
+#endif
+
 #if ENABLED(FILAMENT_LCD_DISPLAY) && ENABLED(SDSUPPORT)
   millis_t previous_lcd_status_ms = 0;
 #endif
   #endif
 
   #if ENABLED(LCD_PROGRESS_BAR)
+
+    //
+    // HD44780 implements the following message blinking and
+    // message expiration because Status Line and Progress Bar
+    // share the same line on the display.
+    //
+
+    // Set current percentage from SD when actively printing
+    #if ENABLED(LCD_SET_PROGRESS_MANUALLY)
+      if (IS_SD_PRINTING)
+        progress_bar_percent = card.percentDone();
+    #endif
+
     millis_t ms = millis();
+
+    // If the message will blink rather than expire...
     #if DISABLED(PROGRESS_MSG_ONCE)
-      if (ELAPSED(ms, progress_bar_ms + PROGRESS_BAR_MSG_TIME + PROGRESS_BAR_BAR_TIME)) {
+      if (ELAPSED(ms, progress_bar_ms + PROGRESS_BAR_MSG_TIME + PROGRESS_BAR_BAR_TIME))
         progress_bar_ms = ms;
-      }
     #endif
+
     #if PROGRESS_MSG_EXPIRE > 0
+
       // Handle message expire
       if (expire_status_ms > 0) {
-        #if ENABLED(SDSUPPORT)
-          if (card.isFileOpen()) {
-            // Expire the message when printing is active
-            if (IS_SD_PRINTING) {
-              if (ELAPSED(ms, expire_status_ms)) {
-                lcd_status_message[0] = '\0';
-                expire_status_ms = 0;
-              }
-            }
-            else {
-              expire_status_ms += LCD_UPDATE_INTERVAL;
-            }
-          }
-          else {
+
+        #if DISABLED(LCD_SET_PROGRESS_MANUALLY)
+          const uint8_t progress_bar_percent = card.percentDone();
+        #endif
+
+        // Expire the message if a job is active and the bar has ticks
+        if (progress_bar_percent > 2 && !print_job_timer.isPaused()) {
+          if (ELAPSED(ms, expire_status_ms)) {
+            lcd_status_message[0] = '\0';
             expire_status_ms = 0;
           }
-        #else
-          expire_status_ms = 0;
-        #endif // SDSUPPORT
+        }
+        else {
+          // Defer message expiration before bar appears
+          // and during any pause (not just SD)
+          expire_status_ms += LCD_UPDATE_INTERVAL;
+        }
       }
-    #endif
+
+    #endif // PROGRESS_MSG_EXPIRE
+
   #endif // LCD_PROGRESS_BAR
 
   #if ENABLED(ULTIPANEL)

Marlin/ultralcd.h

     #define LCD_CLICKED false
   #endif
 
+  #if ENABLED(LCD_SET_PROGRESS_MANUALLY) && (ENABLED(LCD_PROGRESS_BAR) || ENABLED(DOGLCD))
+    extern uint8_t progress_bar_percent;
+  #endif
+
 #else // no LCD
 
   inline void lcd_update() {}

Marlin/ultralcd_impl_DOGM.h

     // SD Card Symbol
     //
 
-    if (PAGE_CONTAINS(42 - (TALL_FONT_CORRECTION), 51 - (TALL_FONT_CORRECTION))) {
+    if (card.isFileOpen() && PAGE_CONTAINS(42 - (TALL_FONT_CORRECTION), 51 - (TALL_FONT_CORRECTION))) {
       // Upper box
       u8g.drawBox(42, 42 - (TALL_FONT_CORRECTION), 8, 7);     // 42-48 (or 41-47)
       // Right edge
         PROGRESS_BAR_WIDTH, 4 - (TALL_FONT_CORRECTION)
       );
 
-    if (IS_SD_PRINTING) {
+    #if DISABLED(LCD_SET_PROGRESS_MANUALLY)
+      const uint8_t progress_bar_percent = card.percentDone();
+    #endif
+
+    if (progress_bar_percent > 1) {
 
       //
       // Progress bar solid part
       if (PAGE_CONTAINS(50, 51 - (TALL_FONT_CORRECTION)))     // 50-51 (or just 50)
         u8g.drawBox(
           PROGRESS_BAR_X + 1, 50,
-          (uint16_t)((PROGRESS_BAR_WIDTH - 2) * card.percentDone() * 0.01), 2 - (TALL_FONT_CORRECTION)
+          (uint16_t)((PROGRESS_BAR_WIDTH - 2) * progress_bar_percent * 0.01), 2 - (TALL_FONT_CORRECTION)
         );
 
       //
         if (PAGE_CONTAINS(41, 48)) {
           // Percent complete
           u8g.setPrintPos(55, 48);
-          u8g.print(itostr3(card.percentDone()));
+          u8g.print(itostr3(progress_bar_percent));
           u8g.print('%');
         }
       #endif

Marlin/ultralcd_impl_HD44780.h

 #include "utf_mapper.h"
 
 #if ENABLED(LCD_PROGRESS_BAR)
-  static millis_t progress_bar_ms = 0;
+  static millis_t progress_bar_ms = 0;     // Start millis of the current progress bar cycle
   #if PROGRESS_MSG_EXPIRE > 0
-    static millis_t expire_status_ms = 0;
+    static millis_t expire_status_ms = 0;  // millis at which to expire the status message
   #endif
   #define LCD_STR_PROGRESS  "\x03\x04\x05"
 #endif
 
     // Draw the progress bar if the message has shown long enough
     // or if there is no message set.
-    if (card.isFileOpen() && (ELAPSED(millis(), progress_bar_ms + PROGRESS_BAR_MSG_TIME) || !lcd_status_message[0])) {
-      const uint8_t percent = card.percentDone();
-      if (percent) return lcd_draw_progress_bar(percent);
-    }
+    #if DISABLED(LCD_SET_PROGRESS_MANUALLY)
+      const uint8_t progress_bar_percent = card.percentDone();
+    #endif
+    if (progress_bar_percent > 2 && (ELAPSED(millis(), progress_bar_ms + PROGRESS_BAR_MSG_TIME) || !lcd_status_message[0]))
+      return lcd_draw_progress_bar(progress_bar_percent);
 
   #elif ENABLED(FILAMENT_LCD_DISPLAY) && ENABLED(SDSUPPORT)