i am a new user and i recently was given a ypt-210 what you do is start with c on the first key remember that when there is a group of two the key directly to the left is the c. So your keyboard will start on c and end on c. Also if you would like you can go off of your center c and work it from there.
Remember center c is marked with the c3 right below the key or can be found by looking at your screen and keying different c keys til you find the one that has the lowest marking on your treble clef. im sorry if this sounds like garble i am new to the piano/ keyboard.
