Can't add a note to woodblock to form chord?

I’m using 4 woodblocks on a grid. I want to add another note so that the player is playing a 2 note chord, but as there is no Q function for this I can’t figure out how to do this.
Slice 1.pdf (9.0 KB)

Select the note, Shift-I, 3.

Thanks for the reply Dan but I’m not getting any results. I’m interpreting your direction as shift dash one comma 3?

No, Dan is recommending you use the Shift+I (capital letter I, the letter between H and J) popover.