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#### 3.18.5 Article Header

These commands perform various transformations of article header.

`W G u`

  Unfold folded header lines (`gnus-article-treat-unfold-headers`).

`W G n`

  Fold the `Newsgroups` and `Followup-To` headers (`gnus-article-treat-fold-newsgroups`).

`W G f`

  Fold all the message headers (`gnus-article-treat-fold-headers`).

`W E w`

  Remove excessive whitespace from all headers (`gnus-article-remove-leading-whitespace`).