Playing technique-specific noteheads use the design and position of noteheads to indicate different playing techniques for unpitched percussion instruments, both as individual instruments and within percussion kits.
For example, side stick notes on the snare drum notes are typically notated using cross noteheads. Other techniques might use the staff positions above or below the single-line staff to indicate different playing techniques.
You can edit the set of playing technique-specific noteheads and staff positions defined for each unpitched percussion instrument in the Percussion Instrument Playing Techniques dialog.
You can select playing technique-specific noteheads for unpitched percussion instruments when inputting notes and change the playing technique-specific noteheads of existing notes.