diff --git a/workspace/TS100/inc/Font.h b/workspace/TS100/inc/Font.h
index c22cc8fb..4a6fb48e 100644
--- a/workspace/TS100/inc/Font.h
+++ b/workspace/TS100/inc/Font.h
@@ -488,8 +488,10 @@ const uint8_t ExtraFontChars[] = {
 
 		0x00,0x00,0x38,0xC4,0x00,0x38,0xC4,0x00,0x38,0xC4,0x00,0x00,0x00,0x38,0x3A,0x39,0x38,0x3A,0x39,0x38,0x3A,0x39,0x10,0x10, // heating
 		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x10,0x10, // cooling
-		0x00,0x60,0xE0,0xFE,0xE0,0xE0,0xE0,0xE0,0xFE,0xE0,0x60,0x00,0x00,0x00,0x00,0x01,0x03,0xFF,0xFF,0x03,0x01,0x00,0x00,0x00
+		0x00,0x60,0xE0,0xFE,0xE0,0xE0,0xE0,0xE0,0xFE,0xE0,0x60,0x00,0x00,0x00,0x00,0x01,0x03,0xFF,0xFF,0x03,0x01,0x00,0x00,0x00, // AC
 
+		0xE0,0xF0,0x98,0x18,0x18,0x18,0x18,0xD8,0x78,0x38,0xFC,0xE6,0x1F,0x3F,0x61,0x63,0x66,0x6C,0x67,0x61,0x60,0x60,0x3F,0x1F, // checkbox on
+		0xE0,0xF0,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0xF0,0xE0,0x1F,0x3F,0x60,0x60,0x60,0x60,0x60,0x60,0x60,0x60,0x3F,0x1F  // checkbox off
 
 		/*
 		0x00,0x00,0x00,0x80,0x80,0xFE,0xFF,0x83,0x87,0x06,0x00,0x00,0x00,0x00,0x30,0x70,0x60,0x7F,0x3F,0x00,0x00,0x00,0x00,0x00, // Function?
diff --git a/workspace/TS100/inc/OLED.hpp b/workspace/TS100/inc/OLED.hpp
index 71a736e3..c1f6ee95 100644
--- a/workspace/TS100/inc/OLED.hpp
+++ b/workspace/TS100/inc/OLED.hpp
@@ -41,6 +41,7 @@ public:
 	// Draws a number at the current cursor location
 	void clearScreen();						// Clears the buffer
 	void drawBattery(uint8_t state);		// Draws the battery level symbol
+	void drawCheckbox(bool state);		// Draws a checkbox
 	void drawSymbol(uint8_t symbolID);//Used for drawing symbols of a predictable width
 	void drawArea(int16_t x, int8_t y, uint8_t wide, uint8_t height,
 			const uint8_t* ptr);
diff --git a/workspace/TS100/src/OLED.cpp b/workspace/TS100/src/OLED.cpp
index 8aa34268..fd5bb322 100644
--- a/workspace/TS100/src/OLED.cpp
+++ b/workspace/TS100/src/OLED.cpp
@@ -272,6 +272,9 @@ void OLED::drawBattery(uint8_t state) {
 		state = 10;
 	drawSymbol(3 + state);
 }
+void OLED::drawCheckbox(bool state) {
+	drawSymbol((state) ? 17 : 18);
+}
 void OLED::drawSymbol(uint8_t symbolID) {
 	//draw a symbol to the current cursor location
 	setFont(2);
diff --git a/workspace/TS100/src/Translation.c b/workspace/TS100/src/Translation.c
index a6525d2b..38a47c23 100644
--- a/workspace/TS100/src/Translation.c
+++ b/workspace/TS100/src/Translation.c
@@ -79,8 +79,6 @@ const char* SleepingAdvancedString = "Sleeping...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";            // Must be <= 4 chars
 const char* WarningAdvancedString = "WARNING! TIP HOT!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -136,8 +134,6 @@ const char* SleepingAdvancedString = "Ожидание...";  // <=17 chars
 const char* WarningSimpleString = " АЙ!";            // Must be <= 4 chars
 const char* WarningAdvancedString = "ОСТОРОЖНО! ГОРЯЧО";
 
-const char SettingTrueChar = '+';
-const char SettingFalseChar = '-';
 /*
  * #TODO change support for multibyte constants here
  const char SettingRightChar = 'П';
@@ -199,8 +195,6 @@ const char* SleepingAdvancedString = "Sleeping...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";            // Must be <= 4 chars
 const char* WarningAdvancedString = "WARNING! TIP HOT!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -256,8 +250,6 @@ const char* SleepingAdvancedString = "Sleeping...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";            // Must be <= 4 chars
 const char* WarningAdvancedString = "WARNING! TIP HOT!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -313,8 +305,6 @@ const char* SleepingAdvancedString = "Standby";  // <=17 chars
 const char* WarningSimpleString = "HOT!";        // Must be <= 4 chars
 const char* WarningAdvancedString = "ATTENZIONE! PUNTA CALDA!";
 
-const char SettingTrueChar = 'A';
-const char SettingFalseChar = 'D';
 const char SettingRightChar = 'D';
 const char SettingLeftChar = 'S';
 const char SettingAutoChar = 'A';
@@ -370,8 +360,6 @@ const char* SleepingAdvancedString = "En veille...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";            // Must be <= 4 chars
 const char* WarningAdvancedString = "ATTENTION! PANNE CHAUDE!";
 
-const char SettingTrueChar = 'V';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'D';
 const char SettingLeftChar = 'G';
 const char SettingAutoChar = 'A';
@@ -427,8 +415,6 @@ const char* SleepingAdvancedString = "Ruhemodus...";  // <=17 chars
 const char* WarningSimpleString = "HEIß";             // Must be <= 4 chars
 const char* WarningAdvancedString = "Achtung! Spitze Heiß!";
 
-const char SettingTrueChar = 'J';
-const char SettingFalseChar = 'N';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -484,8 +470,6 @@ const char* SleepingAdvancedString = "Kludovy rezim...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";                 // Must be <= 4 chars
 const char* WarningAdvancedString = "Pozor! Hrot je horuci!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -541,8 +525,6 @@ const char* SleepingAdvancedString = "Uyuyor...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";          // Must be <= 4 chars
 const char* WarningAdvancedString = "UYARI! UÇ SICAK!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -598,8 +580,6 @@ const char* SleepingAdvancedString = "Spavanje...";  // <=17 chars
 const char* WarningSimpleString = "VRUĆ";            // Must be <= 4 chars
 const char* WarningAdvancedString = "OPREZ! Vršak je vruć!";
 
-const char SettingTrueChar = '+';
-const char SettingFalseChar = '-';
 const char SettingRightChar = 'D';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -655,8 +635,6 @@ const char* SleepingAdvancedString = "Rezim spanku...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";                // Must be <= 4 chars
 const char* WarningAdvancedString = "!! HORKY HROT !!";  // <= 16 chars
 
-const char SettingTrueChar = 'Z';
-const char SettingFalseChar = 'V';
 const char SettingRightChar = 'P';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -712,8 +690,6 @@ const char* SleepingAdvancedString = "Alvás...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";         // Must be <= 4 chars
 const char* WarningAdvancedString = "FIGYELEM! FORRÓ HEGY!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'F';
 const char SettingRightChar = 'R';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
@@ -769,8 +745,6 @@ const char* SleepingAdvancedString = "Dvale...";  // <=17 chars
 const char* WarningSimpleString = "Varm";         // Must be <= 4 chars
 const char* WarningAdvancedString = "ADVARSEL! VARM LODDESPIDS!";
 
-const char SettingTrueChar = 'j';
-const char SettingFalseChar = 'N';
 const char SettingRightChar = 'H';
 const char SettingLeftChar = 'V';
 const char SettingAutoChar = 'A';
@@ -826,8 +800,6 @@ const char* SleepingAdvancedString = "Uspienie...";  // <=17 chars
 const char* WarningSimpleString = "HOT!";            // Must be <= 4 chars
 const char* WarningAdvancedString = "UWAGA! GORĄCA KOŃCÓWKA!";
 
-const char SettingTrueChar = 'T';
-const char SettingFalseChar = 'N';
 const char SettingRightChar = 'P';
 const char SettingLeftChar = 'L';
 const char SettingAutoChar = 'A';
diff --git a/workspace/TS100/src/gui.cpp b/workspace/TS100/src/gui.cpp
index 960cb088..c275039e 100644
--- a/workspace/TS100/src/gui.cpp
+++ b/workspace/TS100/src/gui.cpp
@@ -258,8 +258,7 @@ static void settings_setAdvancedSolderingScreens(void) {
 static void settings_displayAdvancedSolderingScreens(void) {
   printShortDescription(15, 7);
 
-  lcd.drawChar((systemSettings.detailedSoldering) ? SettingTrueChar
-                                                  : SettingFalseChar);
+  lcd.drawCheckbox(systemSettings.detailedSoldering);
 }
 
 
@@ -270,8 +269,7 @@ static void settings_setAdvancedIDLEScreens(void) {
 static void settings_displayAdvancedIDLEScreens(void) {
   printShortDescription(6, 7);
 
-  lcd.drawChar((systemSettings.detailedIDLE) ? SettingTrueChar
-                                             : SettingFalseChar);
+  lcd.drawCheckbox(systemSettings.detailedIDLE);
 }
 
 
@@ -307,8 +305,7 @@ static void settings_setBoostModeEnabled(void) {
 static void settings_displayBoostModeEnabled(void) {
   printShortDescription(8, 7);
 
-  lcd.drawChar((systemSettings.boostModeEnabled) ? SettingTrueChar
-                                                 : SettingFalseChar);
+  lcd.drawCheckbox(systemSettings.boostModeEnabled);
 }
 
 
@@ -339,8 +336,7 @@ static void settings_setAutomaticStartMode(void) {
 static void settings_displayAutomaticStartMode(void) {
   printShortDescription(10, 7);
 
-  lcd.drawChar((systemSettings.autoStartMode) ? SettingTrueChar
-                                              : SettingFalseChar);
+  lcd.drawCheckbox(systemSettings.autoStartMode);
 }
 
 
@@ -351,8 +347,7 @@ static void settings_setCoolingBlinkEnabled(void) {
 static void settings_displayCoolingBlinkEnabled(void) {
   printShortDescription(11, 7);
 
-  lcd.drawChar((systemSettings.coolingTempBlink) ? SettingTrueChar
-                                                 : SettingFalseChar);
+  lcd.drawCheckbox(systemSettings.coolingTempBlink);
 }