Angled bar lines

[Philip (Michael) Dykes]

Hi I need to get a section at the beginning of a piece of liturgical 
music I have (Only Begotten Son) in which /*sometimes*/ a certain thing 
is sung but /not /normally sung indicated. The typical manner I have 
seen this done is via the use of angled bar lines the same as that of 
the angled repeat bar lines I have seen in frescobaldi and such but 
without the repeat signs. Is there a way to do that? I really hope there 
is.

Thanks,
-Michael Dykes
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