Hello Zawinal
Welcome to the forum, this the best Yamaha forum on the internet. Here is a link to our Main page with a lot of how to lesson and free additional styles for your keyboard.
https://www.psrtutorial.com/index.htmlON the main screen when you first start up the keyboard, you will see :
BAR 001
BEAT 1
CHORD C <-- this is where the chord you are playing appears.
Using the single-finger method, you can easily play all major, minor, seventh, and minor seventh chords:
• In this mode, you need only press a single key, the "root" value of the chord, as described above to trigger any major chord.
• For a minor chord, you press two keys at once, the root key and a black key to the left of that root. For example, to signal the Em chord, you would press simultaneously the Eb1 (the first black key to the left of the E key) key and the E1 key .
• For the seventh chord, simultaneously press the root key and a white key to its left. (E7 would be signaled by pressing simultaneously D1 and E1.)
• For a minor seventh chord, simultaneously press the root key and both a white and black key to its left. (Em7 would require pressing D1 and Eb1 and E1 all at the same time.)
Chord you can make for example are:
C, Cm, C7 and Cm7
F, Fm, F7 and Fm7
G, Gm, G7 and Gm7
A song in the key of C could use the chords: C, Am, Dm, F, G and Em as an example. That is all you need for playing pop songs since the 1950's
https://www.psrtutorial.com/lessons/start/s50_fingering.htmlRegards
Drake