Apple Logic Pro X - Manual (Page 697)

Chapter 20 View and edit music notation 697
Use drum notation with mapped staff styles
In MIDI regions assigned to drum instruments, each MIDI note usually triggers a different sound.
When viewed using a regular staff style, the notes have no apparent relationship to the sounds
you hear. You can display these regions as a readable drum part with special drum note heads,
using mapped instruments and mapped staff styles.
When Additional Score Options is selected in the Advanced preferences pane, you can
create and edit mapped staff styles. Mapped staff styles allow you to assign individual voices to
drum groups, which use specific drum note heads to display note events. You can define the
respective drum note head shapes in a Mapped Instrument window.
The best way to create drum notation for an existing region is to open the Score Editor to view
the MIDI region, and also open the Mapped Instrument window and the Staff Style window. This
way, you can directly see how parameter changes affect the score display.
Before defining the details of a mapped staff style, you should set up all drum groups, note head
shapes, and relative note position parameters in the Mapped Instrument window.