After choosing a genre and drummer, you can choose from a collection of drummer-specific presets in the Drummer Editor. Presets offer a quick way to browse predefined, region-based Drummer Editor settings, including kit piece pattern variations and fill settings.
Click the Play button in the ruler at the top of the editor.
Click a preset on the left side of the editor.
The region settings on the right side of the editor update to reflect the chosen preset, and the selected region in the Tracks area is regenerated.