Pitched cues cannot be directly added to an unpitched part. The advice when they are required is to add an arbitrary pitched instrument to the unpitched player, to make a five-line staff available, and add the pitched cues to that (fictitious) pitched player in galley view. I’m attaching an example of the unedited result in a snare drum part. I added a violin to the snare drum player, for no better reason than that the first cue is in the solo violin.
(1) Each passage for snare drum is labelled ‘S. D.’ and is followed by ‘To Vln’; the subsequent cue is labelled ‘Vln’. This is of course inappropriate and points clearly to the workaround nature of the solution, but getting rid of the unwanted labels is straightforward if tedious.
(2) More seriously: the score is mostly in three flats. Correctly, no key signature appears in the S.D. part. But the pitched cues are displayed as if the key signature was visible. Note the superfluous naturals in the first cue. And in b71, the apparent As are A flats, and the apparent E in b72 is an E flat. This is absolutely wrong, though once again it is fixable by painstakingly hiding and showing accidentals as required. Fortunately there were only about half a dozen cues in the part!
(3) Although the snare drum uses a single-line staff, more than half of the part has a five-line staff — not just the cues, but all the bars leading up to them. I could not find any way to fix this.
Hoping that a better solution may be in the pipeline.