Reset button. This button will reset all notes in the circle and make the circle empty. Usually this button is used to start work in a circle from the beginning.

Invert button. This button causes the opposite state of the circle. For example, if no notes are selected in the circle and at the same time click on the invert button, then the circle will display all the notes at once, that is, it will invert. Usually this button is used to display the opposite state of some interval structure.

Forward forward button This button builds the next scale step from the center note. For example, if the Ionian mode is lined up in a circle from the note C, then by pressing the “Forward look” button from the note C, the Dorian mode, the second step of the Ionian, is lined up. By pressing the button again, the third step of the Ionian fret, Phrygian, will line up from the note C, etc.

Backward button. If the previous button built the scale steps from the center note in sequential order, the Backward button builds the scale steps in the opposite direction.

Play Scale button. This button plays the scale or scale selected in the circle.

Listen Chord button. This button plays the selected chord from the list or table.