updated README

Genivia · Aug 21, 2023 · 8cdd5af · 8cdd5af
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@@ -78,6 +78,9 @@ Why use ugrep?
 - Search pdf, doc, docx, e-book, and more with `ug+` [using filters](#filter) associated with filename extensions:
 
       ug+ PATTERN ...
+
+  or specify `--filter` with a file type to use a filter utility:
+
       ug --filter='pdf:pdftotext % -' PATTERN ...
       ug --filter='doc:antiword %' PATTERN ...
       ug --filter='odt,docx,epub,rtf:pandoc --wrap=preserve -t plain % -o -' PATTERN ...