Finale-Allegro Question

For anyone who uses the Finale family of notation applications, I have a 
question.

How do you change a note from the standard format to one with an "x" in 
place of the notehead to indicate a variable or indeterminate pitch?

I know that the "x" notehead is included in the Maestro font and there's 
even a tool on the "Special Tools Palette" with that symbol on it but I 
can't seem to figure out how to produce it. If the answer is in the 
manual, I can't seem to find it.

Any help would be appreciated.