If you want a drum fill into the chorus from the verse, just click the measure number and a green or blue box will go around the number, indicating a transition. A drum fill into the next section is generated. The green or blue box indicates which variation of the style will be played in the next section. If the verse started with a measure with a blue box, and the box at the beginning of the chorus is also blue, the sub style will remain the same between the 2 sections. If the new box is a green one, the style will change for the chorus, usually more active rhythmically, or louder. Clicking again on the box will toggle between the 2 variations (with appropriate lead-in fills) and no box, which would indicate no change in style or lead-in fill.

If, by break, you mean you want the music to stop or hold for a number of beats, type dots (periods) after the chord where you want the "break". With 2 period, the instruments hit the 1st chord and stop, until the next chord change. With 3 periods, the chord on the first beat holds (sustains) until the next chord. You can also type a d for drums or b for bass after the 3 periods and those instruments will keep playing while the others hold. This is useful when