diff --git a/libs/color-sensor/color.ts b/libs/color-sensor/color.ts
index 33f61a2b..8baee344 100644
--- a/libs/color-sensor/color.ts
+++ b/libs/color-sensor/color.ts
@@ -232,11 +232,17 @@ namespace sensors {
             return this.getNumber(NumberFormat.UInt8LE, 0)
         }
 
+        /**
+         * Gets the ambient light
+         */
         //%
         ambientLight() {
             return this.light(LightIntensityMode.Ambient);
         }
 
+        /**
+         * Gets the reflected light value
+         */
         //%
         reflectedLight() {
             return this.light(LightIntensityMode.Reflected);
@@ -245,10 +251,10 @@ namespace sensors {
         /**
          * Set a threshold value
          * @param condition the dark or bright light condition
-         * @param value the value threshold
+         * @param value the value threshold, eg: 10
          */
         //% blockId=colorSetThreshold block="set **color sensor** %this|%condition|to %value"
-        //% group="Threshold" blockGap=8 weight=90
+        //% group="Calibration" blockGap=8 weight=90
         //% value.min=0 value.max=100
         //% this.fieldEditor="ports"
         //% help=sensors/color-sensor/set-threshold
@@ -269,7 +275,7 @@ namespace sensors {
          * @param condition the light condition
          */
         //% blockId=colorGetThreshold block="**color sensor** %this|%condition"
-        //% group="Threshold" blockGap=8 weight=89
+        //% group="Calibration" weight=89
         //% this.fieldEditor="ports"
         //% help=sensors/color-sensor/threshold
         threshold(condition: Light): number {
@@ -285,7 +291,7 @@ namespace sensors {
          * Collects measurement of the light condition and adjusts the threshold to 10% / 90%.
          */
         //% blockId=colorCalibrateLight block="calibrate **color sensor** %this|for %mode"
-        //% group="Threshold" weight=91 blockGap=8
+        //% group="Calibration" weight=91 blockGap=8
         //% this.fieldEditor="ports"
         //% help=sensors/color-sensor/calibrate-light
         calibrateLight(mode: LightIntensityMode, deviation: number = 8) {
diff --git a/libs/ev3/ns.ts b/libs/ev3/ns.ts
index dccf5665..1da62b78 100644
--- a/libs/ev3/ns.ts
+++ b/libs/ev3/ns.ts
@@ -8,7 +8,7 @@ namespace brick {
 
 //% color="#C8509B" weight=95 icon="\uf10f"
 //% labelLineWidth=100
-//% groups='["Touch Sensor", "Color Sensor", "Ultrasonic Sensor", "Gyro Sensor", "Infrared Sensor", "Remote Infrared Beacon", "Threshold"]'
+//% groups='["Touch Sensor", "Color Sensor", "Ultrasonic Sensor", "Gyro Sensor", "Infrared Sensor", "Remote Infrared Beacon", "Calibration"]'
 namespace sensors {
 }
 
diff --git a/libs/infrared-sensor/ir.ts b/libs/infrared-sensor/ir.ts
index 1a11b2eb..11ffd744 100644
--- a/libs/infrared-sensor/ir.ts
+++ b/libs/infrared-sensor/ir.ts
@@ -261,7 +261,7 @@ namespace sensors {
          * @param value the value threshold
          */
         //% blockId=irSetThreshold block="set **infrared** %this|%condition|to %value"
-        //% group="Threshold" blockGap=8 weight=49
+        //% group="Calibration" blockGap=8 weight=49
         //% value.min=0 value.max=100
         //% this.fieldEditor="ports"
         setPromixityThreshold(condition: InfraredSensorEvent, value: number) {
@@ -276,7 +276,7 @@ namespace sensors {
          * @param condition the proximity condition
          */
         //% blockId=irGetThreshold block="**infrared** %this|%condition"
-        //% group="Threshold" blockGap=8 weight=49
+        //% group="Calibration" weight=49
         //% this.fieldEditor="ports"
         proximityThreshold(condition: InfraredSensorEvent): number {
             return this._proximityThreshold.threshold(<ThresholdState><number>condition);
diff --git a/libs/ultrasonic-sensor/ultrasonic.ts b/libs/ultrasonic-sensor/ultrasonic.ts
index f0a1c13b..7df02881 100644
--- a/libs/ultrasonic-sensor/ultrasonic.ts
+++ b/libs/ultrasonic-sensor/ultrasonic.ts
@@ -96,7 +96,7 @@ namespace sensors {
          * @param value the value threshold
          */
         //% blockId=ultrasonicSetThreshold block="set **ultrasonic** %this|%condition|to %value"
-        //% group="Threshold" blockGap=8 weight=80
+        //% group="Calibration" blockGap=8 weight=80
         //% value.min=0 value.max=255
         //% this.fieldEditor="ports"
         setThreshold(condition: UltrasonicSensorEvent, value: number) {
@@ -111,7 +111,7 @@ namespace sensors {
          * @param condition the proximity condition
          */
         //% blockId=ultrasonicGetThreshold block="**ultrasonic** %this|%condition"
-        //% group="Threshold" blockGap=8 weight=79
+        //% group="Calibration" weight=79
         //% this.fieldEditor="ports"
         threshold(condition: UltrasonicSensorEvent): number {
             switch (condition) {