Add the following to void loop (). void loop() { M5.update(); if(M5.BtnA.wasPressed()){M5.Lcd.setRotation(3);M5.Lcd.fillScreen(TFT_BLACK);analogMeter();} if(M5.BtnC.wasPressed()){M5.Lcd.setRotation(1);M5.Lcd.fillScreen(TFT_BLACK);analogMeter();}