Is there a way in Nisus to "Find italics"?

I have to post a 25,000 word text to a site that does not show italics  
but I need to indicate where italics belong. My intention is to  
bracket italicised text with degree signs [e.g.,°italics°]. I can do  
the degree sign entry manually but I want to be sure that I find all  
italics first.

I would have thought that 'find italics' or 'find bold' would have  
been available part of the basic find/replace dialog but cannot find it.

AlanD