Notes in parentheses?

[Carl Waters]

Hello,
I am writing a piece in which it would be very useful to put notes in 
parentheses (I believe it is called *ghosting*) and I see an example of this 
on the Lilypond page but I do not know how to follow this example.  Also, 
anybody know about Jack's dashed-bar question?  That would be useful as 
well.
Thanks,

Carl

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