You can change the default stem direction of all notes on single-line percussion staves project-wide, including grace notes.
Procedure
- Press Ctrl/Cmd-Shift-E to open Engraving Options.
- In the category list, click Percussion.
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In the Single-line Percussion section, choose one of the following options for Default stem direction:
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Up
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Down
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- Activate/Deactivate Grace notes follow default stem direction.
- Click Apply, then Close.