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This post shows how to obtain a one-line staff. Replace the percussion clef with an invisible one, add the time signature and repeat barlines, and enter the following sequence of pitches as sixteenth notes: F D F D G D F D. Change the third and seventh noteheads to X noteheads. Select the first notehead and set the bracket style to round. In engrave mode, select the second, fifth, sixth and eighth noteheads and hide the noteheads and the ledger line. Make these noteheads invisible by unchecking View>Note And Rest Colors>Hidden Noteheads. Finally, select both beams and move them upward.