Make lower case for pattern in TextEdit If I select text using a pattern in TextEdit how do I transform that selected text?  I can't get anything in the Transform menu to work when text is selected like this.

I am using a pattern to find and highlight text.
You can't, as the 'selected text' is your search parameter, not your document contents. 

You'd need to use Replace &amp; set your desired capitalisation change in there - for which you could copy paste into replace &amp; use the very function you're trying to use in the main text.