Apple Logic Pro X - Manual (Page 56)

Chapter 2 Get started with Logic Pro X 56
Note: The presence of ghost notes depends on the chosen drummer and the
complexity setting.
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Drag the Hi-Hat knob to adjust the degree to which the Hi-Hat is opened and closed during
the drum performance.
Note: This is only relevant if the hi-hat is selected in the drum kit representation.
Any changes or selections you make in the Drummer Editor affect only the selected region,
not the entire track. For more information about using Drummer in your projects, see
Drummer overview .