What does it mean to play the songs on the electronic organ, some with dots and some with arcs? How to learn?

1, there are two kinds of points, one is directly above the sound, indicating jumping, which should be very light.

The other is on the right side of the tone, which means extending the tone by half.

2. Arc means Legato. There are two kinds of playing, electronic organ or piano.

One is that if the notes are the same, don't play anything in the arc except the first note.

On the other hand, if the voice is different, it means that there is no hand raising when playing, and there is a continuous state.

3, the most basic books will be available. When I teach students, these are all in the basic skills.