diff --git a/sys/arduino/u8g2_page_buffer/MUICountDown/Makefile.1819.uno b/sys/arduino/u8g2_page_buffer/MUICountDown/Makefile.1819.uno
new file mode 100644
index 000000000..7f144b3fa
--- /dev/null
+++ b/sys/arduino/u8g2_page_buffer/MUICountDown/Makefile.1819.uno
@@ -0,0 +1,147 @@
+#
+# Makefile.180 for Arduino/AVR 
+#
+#  Note:
+#  	Display list make database: make -p -f/dev/null | less
+
+
+# Install path of the arduino software. Requires a '/' at the end.
+ARDUINO_PATH:=/home/kraus/prg/arduino-1.8.19/
+
+# Board (and prozessor) information: see $(ARDUINO_PATH)hardware/arduino/avr/boards.txt
+# Some examples:
+#	BOARD		DESCRIPTION
+#	uno			Arduino Uno
+#	atmega328	Arduino Duemilanove or Nano w/ ATmega328
+#	diecimila		Arduino Diecimila, Duemilanove, or Nano w/ ATmega168
+#	mega		Arduino Mega
+#	mega2560	Arduino Mega2560
+#	mini			Arduino Mini
+#	lilypad328	LilyPad Arduino w/ ATmega328  
+BOARD:=uno
+
+# The unix device where we can reach the arduino board
+# Uno: /dev/ttyACM0
+# Duemilanove: /dev/ttyUSB0
+AVRDUDE_PORT:=/dev/ttyACM0
+
+
+
+SRC_DIRS=$(ARDUINO_PATH)hardware/arduino/avr/cores/arduino/
+SRC_DIRS+=$(ARDUINO_PATH)hardware/arduino/avr/libraries/SPI/src/
+SRC_DIRS+=$(ARDUINO_PATH)hardware/arduino/avr/libraries/SPI/src/utility/
+SRC_DIRS+=$(ARDUINO_PATH)hardware/arduino/avr/libraries/Wire/src/
+SRC_DIRS+=$(ARDUINO_PATH)hardware/arduino/avr/libraries/Wire/src/utility/
+SRC_DIRS+=../../../../csrc/
+SRC_DIRS+=../../../../cppsrc/
+
+#=== suffixes ===
+.SUFFIXES: .elf .hex .ino
+
+#=== identify user files ===
+INOSRC:=$(shell ls *.ino)
+TARGETNAME=$(basename $(INOSRC))
+
+#=== internal names ===
+LIBNAME:=$(TARGETNAME).a
+ELFNAME:=$(TARGETNAME).elf
+HEXNAME:=$(TARGETNAME).hex
+BINNAME:=$(TARGETNAME).bin
+DISNAME:=$(TARGETNAME).dis
+MAPNAME:=$(TARGETNAME).map
+
+
+#=== replace standard tools ===
+CC:=$(ARDUINO_PATH)hardware/tools/avr/bin/avr-gcc
+CXX:=$(ARDUINO_PATH)hardware/tools/avr/bin/avr-g++
+AR:=$(ARDUINO_PATH)hardware/tools/avr/bin/avr-gcc-ar
+OBJCOPY:=$(ARDUINO_PATH)hardware/tools/avr/bin/avr-objcopy
+OBJDUMP:=$(ARDUINO_PATH)hardware/tools/avr/bin/avr-objdump
+SIZE:=$(ARDUINO_PATH)hardware/tools/avr/bin/avr-size
+
+AVRDUDE = $(ARDUINO_PATH)hardware/tools/avr/bin/avrdude
+
+
+#=== get values from boards.txt ===
+BOARDS_TXT:=$(ARDUINO_PATH)hardware/arduino/avr/boards.txt
+
+# get the MCU value from the $(BOARD).build.mcu variable. For the atmega328 board this is atmega328p
+MCU:=$(shell sed -n -e "s/$(BOARD).build.mcu=\(.*\)/\1/p" $(BOARDS_TXT))
+# get the F_CPU value from the $(BOARD).build.f_cpu variable. For the atmega328 board this is 16000000
+F_CPU:=$(shell sed -n -e "s/$(BOARD).build.f_cpu=\(.*\)/\1/p" $(BOARDS_TXT))
+# get variant subfolder
+VARIANT:=$(shell sed -n -e "s/$(BOARD).build.variant=\(.*\)/\1/p" $(BOARDS_TXT))
+UPLOAD_SPEED:=$(shell sed -n -e "s/$(BOARD).upload.speed=\(.*\)/\1/p" $(BOARDS_TXT))
+# get the AVRDUDE_PROGRAMMER value from the $(BOARD).upload.protocol variable. For the atmega328 board this is stk500
+UPLOAD_PROTOCOL:=$(shell sed -n -e "s/$(BOARD).upload.protocol=\(.*\)/\1/p" $(BOARDS_TXT))
+# use stk500v1, because stk500 will default to stk500v2
+#UPLOAD_PROTOCOL:=stk500v1
+
+AVRDUDE_FLAGS = -V -F
+AVRDUDE_FLAGS += -C $(ARDUINO_PATH)/hardware/tools/avr/etc/avrdude.conf
+AVRDUDE_FLAGS += -p $(MCU)
+AVRDUDE_FLAGS += -P $(AVRDUDE_PORT)
+AVRDUDE_FLAGS += -c $(UPLOAD_PROTOCOL) 
+AVRDUDE_FLAGS += -b $(UPLOAD_SPEED)
+AVRDUDE_FLAGS += -U flash:w:$(HEXNAME)
+
+#=== get all include dirs ===
+INC_DIRS:=. $(SRC_DIRS) $(ARDUINO_PATH)hardware/arduino/avr/variants/$(VARIANT)
+INC_OPTS:=$(addprefix -I,$(INC_DIRS))
+
+#=== get all source files ===
+CSRC:=$(shell ls $(addsuffix *.c,$(SRC_DIRS)) 2>/dev/null) 
+CPPSRC:=$(shell ls $(addsuffix *.cpp,$(SRC_DIRS)) 2>/dev/null)
+
+#=== get all obj files ===
+COBJ:=$(CSRC:.c=.o)
+CPPOBJ:=$(CPPSRC:.cpp=.o)
+OBJ:=$(COBJ) $(CPPOBJ) $(TARGETNAME).o
+
+
+#=== options ===
+
+COMMON_FLAGS = -g -Os -DF_CPU=$(F_CPU) -mmcu=$(MCU) 
+COMMON_FLAGS +=-DARDUINO=10800 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR
+COMMON_FLAGS +=-ffunction-sections -fdata-sections -MMD -flto -fno-fat-lto-objects
+COMMON_FLAGS +=$(INC_OPTS)
+CFLAGS:=$(COMMON_FLAGS) -std=gnu99 -Wstrict-prototypes  -Wall -Wextra
+CXXFLAGS:=$(COMMON_FLAGS) -std=gnu++11 -fpermissive -fno-exceptions
+LDFLAGS:=-g -Os  -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=$(MCU) -Wl,--Map=$(MAPNAME)
+LDLIBS:=-lm
+
+all: $(HEXNAME) $(DISNAME)
+	$(SIZE) $(ELFNAME)
+
+.PHONY: debug
+debug: 
+	@echo $(MCU) $(F_CPU) $(VARIANT) $(UPLOAD_SPEED) $(UPLOAD_PROTOCOL)
+	@echo $(SRC_DIRS)
+	@echo $(CSRC)
+	@echo $(CPPSRC)
+	@echo $(INC_OPTS)
+
+.PHONY: clean
+clean:
+	$(RM) $(OBJ) $(HEXNAME) $(ELFNAME) $(LIBNAME) $(DISNAME) $(MAPNAME) $(BINNAME)
+
+.PHONY: upload
+upload: $(HEXNAME)
+	stty -F $(AVRDUDE_PORT) hupcl
+	$(AVRDUDE) $(AVRDUDE_FLAGS)
+
+# implicit rules
+.ino.cpp:
+	@cp $< $@
+	
+.elf.hex:
+	@$(OBJCOPY) -O ihex -R .eeprom $< $@
+
+# explicit rules
+$(ELFNAME): $(LIBNAME)($(OBJ)) 
+	$(LINK.o) $(LFLAGS) $(LIBNAME) $(LDLIBS) -o $@
+
+$(DISNAME): $(ELFNAME)
+	$(OBJDUMP) -D -S $< > $@
+
+	
diff --git a/sys/sdl/mui_all/main.c b/sys/sdl/mui_all/main.c
index 9b27802a1..6ff9fdbe1 100644
--- a/sys/sdl/mui_all/main.c
+++ b/sys/sdl/mui_all/main.c
@@ -210,6 +210,23 @@ uint8_t muif_array_pos_selection(mui_t *ui, uint8_t msg)
   return return_value;
 }
 
+/* https://github.com/olikraus/u8g2/discussions/2516 */
+uint8_t mui_goto_or_back_form_w1_pi(mui_t *ui, uint8_t msg)
+{
+  if ( msg == MUIF_MSG_CURSOR_SELECT )
+  {
+    if ( mui_GetSelectableFieldTextOption(ui, ui->last_form_fds, ui->arg + ui->form_scroll_top) )
+    {
+      
+      if ( (uint8_t)ui->text[0] == 254 ) // use MUI_254 for the return
+      {
+         mui_RestoreForm(ui);
+         return 0;
+      }
+    }
+  }
+  return mui_u8g2_goto_form_w1_pi(ui,  msg);  // call the original MUIF
+}
 
 /*=================================================*/
 /* list functions (get cnt/get element pairs) */
@@ -285,7 +302,8 @@ muif_t muif_list[] MUI_PROGMEM = {
   MUIF_LABEL(mui_u8g2_draw_text),
 
   MUIF_RO("GP",mui_u8g2_goto_data),
-  MUIF_BUTTON("GC", mui_u8g2_goto_form_w1_pi),
+  MUIF_BUTTON("GC", mui_goto_or_back_form_w1_pi),  /* mui_u8g2_goto_form_w1_pi replaced by mui_goto_or_back_form_w1_pi */
+  
 
   MUIF_BUTTON("BK", mui_u8g2_btn_back_wm_fi),
 
@@ -373,7 +391,8 @@ MUI_DATA("GP",
   MUI_11 "btn_goto_wm_fi|" 
   MUI_12 "btn_goto_w1_pi|" 
   MUI_13 "btn_goto_w2_fi|"
-  MUI_1 "Back to Main Menu" )
+  MUI_1 "Back to Main Menu" 
+  )
 MUI_XYA("GC", 5, 25, 0) 
 MUI_XYA("GC", 5, 37, 1) 
 MUI_XYA("GC", 5, 49, 2) 
@@ -428,6 +447,7 @@ MUI_DATA("GP",
   MUI_22 "u8_min_max_wm_mud_pi|" 
   MUI_23 "u8_min_max_wm_mse_pf|" 
   MUI_24 "u8_min_max_wm_mud_pf|" 
+  MUI_254 "2nd Back to Main Menu|"
   MUI_1 "Back to Main Menu" )
 MUI_XYA("GC", 5, 25, 0) 
 MUI_XYA("GC", 5, 37, 1)