diff --git a/Firmware/mesh_bed_calibration.cpp b/Firmware/mesh_bed_calibration.cpp
index 62bcca3c..006cc487 100644
--- a/Firmware/mesh_bed_calibration.cpp
+++ b/Firmware/mesh_bed_calibration.cpp
@@ -3129,6 +3129,11 @@ void mbl_settings_init() {
 	}
 }
 
+//parameter ix: index of mesh bed leveling point in X-axis (for meas_points == 7 is valid range from 0 to 6; for meas_points == 3 is valid range from 0 to 2 )  
+//parameter iy: index of mesh bed leveling point in Y-axis (for meas_points == 7 is valid range from 0 to 6; for meas_points == 3 is valid range from 0 to 2 ) 
+//parameter meas_points: number of mesh bed leveling points in one axis; currently designed and tested for values 3 and 7
+//parameter zigzag: false if ix is considered 0 on left side of bed and ix rises with rising X coordinate; true if ix is considered 0 on the right side of heatbed for odd iy values (zig zag mesh bed leveling movements)  
+//function returns true if point is considered valid (typicaly in safe distance from magnet or another object which inflences PINDA measurements)
 bool mbl_point_measurement_valid(uint8_t ix, uint8_t iy, uint8_t meas_points, bool zigzag) {
 	    //"human readable" heatbed plan
 		//magnet proximity influence Z coordinate measurements significantly (40 - 100 um)
@@ -3138,13 +3143,14 @@ bool mbl_point_measurement_valid(uint8_t ix, uint8_t iy, uint8_t meas_points, bo
 
 		uint8_t valid_points_mask[7] = {
 					//[X_MAX,Y_MAX]
-			0b1111111,
-			0b1111111,
-			0b1110111,
-			0b1111011,
-			0b1110111,
-			0b1111111,
-			0b1111111,
+			//0123456
+			0b1111111,//6
+			0b1111111,//5
+			0b1110111,//4
+			0b1111011,//3
+			0b1110111,//2
+			0b1111111,//1
+			0b1111111,//0
 		//[0,0]
 		};
 		if (meas_points == 3) {
diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index 5128c77a..017df6a9 100644
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -6675,20 +6675,20 @@ static void lcd_tune_menu()
 	MENU_END();
 }
 
-static void mbl_magnets_elimination_set() {
+static void mbl_magnets_elimination_toggle() {
 	bool magnet_elimination = (eeprom_read_byte((uint8_t*)EEPROM_MBL_MAGNET_ELIMINATION) > 0);
 	magnet_elimination = !magnet_elimination;
 	eeprom_update_byte((uint8_t*)EEPROM_MBL_MAGNET_ELIMINATION, (uint8_t)magnet_elimination);
 }
 
-static void mbl_mesh_set() {
+static void mbl_mesh_toggle() {
 	uint8_t mesh_nr = eeprom_read_byte((uint8_t*)EEPROM_MBL_POINTS_NR);
 	if(mesh_nr == 3) mesh_nr = 7;
 	else mesh_nr = 3;
 	eeprom_update_byte((uint8_t*)EEPROM_MBL_POINTS_NR, mesh_nr);
 }
 
-static void mbl_probe_nr_set() {
+static void mbl_probe_nr_toggle() {
 	mbl_z_probe_nr = eeprom_read_byte((uint8_t*)EEPROM_MBL_PROBE_NR);
 	switch (mbl_z_probe_nr) {
 		case 1: mbl_z_probe_nr = 3; break;
@@ -6707,16 +6707,16 @@ static void lcd_mesh_bed_leveling_settings()
 
 	MENU_BEGIN();
 	MENU_ITEM_BACK_P(_T(MSG_SETTINGS)); 
-	if(points_nr == 3) MENU_ITEM_FUNCTION_P(_i("Mesh         [3x3]"), mbl_mesh_set); ////MSG_MESH_3x3 c=18 r=0
-	else			   MENU_ITEM_FUNCTION_P(_i("Mesh         [7x7]"), mbl_mesh_set); ////MSG_MESH_7x7 c=18 r=0
+	if(points_nr == 3) MENU_ITEM_FUNCTION_P(_i("Mesh         [3x3]"), mbl_mesh_toggle); ////MSG_MESH_3x3 c=18 r=0
+	else			   MENU_ITEM_FUNCTION_P(_i("Mesh         [7x7]"), mbl_mesh_toggle); ////MSG_MESH_7x7 c=18 r=0
 	switch (mbl_z_probe_nr) {
-		case 1: MENU_ITEM_FUNCTION_P(_i("Z-probe nr.    [1]"), mbl_probe_nr_set); break; ////MSG_Z_PROBE_NR_1 c=18 r=0
-		case 5: MENU_ITEM_FUNCTION_P(_i("Z-probe nr.    [5]"), mbl_probe_nr_set); break; ////MSG_Z_PROBE_NR_1 c=18 r=0
-		default: MENU_ITEM_FUNCTION_P(_i("Z-probe nr.    [3]"), mbl_probe_nr_set); break; ////MSG_Z_PROBE_NR_1 c=18 r=0
+		case 1: MENU_ITEM_FUNCTION_P(_i("Z-probe nr.    [1]"), mbl_probe_nr_toggle); break; ////MSG_Z_PROBE_NR_1 c=18 r=0
+		case 5: MENU_ITEM_FUNCTION_P(_i("Z-probe nr.    [5]"), mbl_probe_nr_toggle); break; ////MSG_Z_PROBE_NR_1 c=18 r=0
+		default: MENU_ITEM_FUNCTION_P(_i("Z-probe nr.    [3]"), mbl_probe_nr_toggle); break; ////MSG_Z_PROBE_NR_1 c=18 r=0
 	}
 	if (points_nr == 7) {
-		if (magnet_elimination) MENU_ITEM_FUNCTION_P(_i("Magnets comp. [On]"), mbl_magnets_elimination_set); ////MSG_MAGNETS_COMP_ON c=18 r=0
-		else				    MENU_ITEM_FUNCTION_P(_i("Magnets comp.[Off]"), mbl_magnets_elimination_set); ////MSG_MAGNETS_COMP_OFF c=18 r=0
+		if (magnet_elimination) MENU_ITEM_FUNCTION_P(_i("Magnets comp. [On]"), mbl_magnets_elimination_toggle); ////MSG_MAGNETS_COMP_ON c=18 r=0
+		else				    MENU_ITEM_FUNCTION_P(_i("Magnets comp.[Off]"), mbl_magnets_elimination_toggle); ////MSG_MAGNETS_COMP_OFF c=18 r=0
 	}
 	else					        menu_item_text_P(_i("Magnets comp.[N/A]")); ////MSG_MAGNETS_COMP_NA c=18 r=0
 	MENU_END();