Set Division Value to 1/128 Note

Set the beat division to a 1/128th note.

Set the time signature of a Logic Pro project — Apple Support

The division value defines the division in all position displays (such as in the editors), and forms the grid for various length and placement operations. The division value is normally set to 1/16 notes, but can range in value from 1/4 to 1/192 notes. If the note value of the division is equal to or greater than the bar denominator, the third value of the position display is removed.