I’d like to end an unpitched percussion roll with an accented acciaccatura at the start of the next bar (measure).
When I try to insert the acciaccatura by clicking on the empty bar rest in which I want the acciaccatura to appear, and then using Shift-N and then typing ‘/’ as the manual says here:
…nothing happens. No acciaccatura appears.
What am I doing wrong?
May seem like a stupid question, but did you also input a pitch at the end of all that?
Ah. Not a stupid question at all. Thanks eddjcaine. 
Thus I need to input:
/C
…to have the acciaccatura appear at ‘C’.
Yes that’s right 
No problem!
@evansf if you’re still fairly new to Dorico, you might benefit from our First Steps guide. It takes you step-by-step through creating a piano piece, including adding a grace note.
Thanks again Lillie.