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#### 11.2.8.2 September Gnus

New features in Gnus 5.2/5.3:

- A new message composition mode is used. All old customization variables for `mail-mode`, `rnews-reply-mode` and `gnus-msg` are now obsolete.
- Gnus is now able to generate sparse threads—threads where missing articles are represented by empty nodes (see Customizing Threading).

      (setq gnus-build-sparse-threads 'some)

- Outgoing articles are stored on a special archive server (see Archived Messages).
- Partial thread regeneration now happens when articles are referred.
- Gnus can make use of GroupLens predictions.
- Picons (personal icons) can be displayed under XEmacs (see Picons).
- A `trn`-like tree buffer can be displayed (see Tree Display).

      (setq gnus-use-trees t)

- An `nn`-like pick-and-read minor mode is available for the summary buffers (see Pick and Read).

      (add-hook 'gnus-summary-mode-hook 'gnus-pick-mode)

- In binary groups you can use a special binary minor mode (see Binary Groups).
- Groups can be grouped in a folding topic hierarchy (see Group Topics).

      (add-hook 'gnus-group-mode-hook 'gnus-topic-mode)

- Gnus can re-send and bounce mail (see Summary Mail Commands).
- Groups can now have a score, and bubbling based on entry frequency is possible (see Group Score).

      (add-hook 'gnus-summary-exit-hook 'gnus-summary-bubble-group)

- Groups can be process-marked, and commands can be performed on groups of groups (see Marking Groups).
- Caching is possible in virtual groups.
- `nndoc` now understands all kinds of digests, mail boxes, rnews news batches, ClariNet briefs collections, and just about everything else (see Document Groups).
- Gnus has a new back end (`nnsoup`) to create/read SOUP packets.
- The Gnus cache is much faster.
- Groups can be sorted according to many criteria (see Sorting Groups).
- New group parameters have been introduced to set list-addresses and expiry times (see Group Parameters).
- All formatting specs allow specifying faces to be used (see Formatting Fonts).
- There are several more commands for setting/removing/acting on process marked articles on the `M P` submap (see Setting Process Marks).
- The summary buffer can be limited to show parts of the available articles based on a wide range of criteria. These commands have been bound to keys on the `/` submap (see Limiting).
- Articles can be made persistent with the `*` command (see Persistent Articles).
- All functions for hiding article elements are now toggles.
- Article headers can be buttonized (see Article Washing).
- All mail back ends support fetching articles by `Message-ID`.
- Duplicate mail can now be treated properly (see Duplicates).
- All summary mode commands are available directly from the article buffer (see Article Keymap).
- Frames can be part of `gnus-buffer-configuration` (see Window Layout).
- Mail can be re-scanned by a daemonic process (see Daemons).
- Groups can be made permanently visible (see Listing Groups).

      (setq gnus-permanently-visible-groups "^nnml:")

- Many new hooks have been introduced to make customizing easier.
- Gnus respects the `Mail-Copies-To` header.
- Threads can be gathered by looking at the `References` header (see Customizing Threading).

      (setq gnus-summary-thread-gathering-function
            'gnus-gather-threads-by-references)

- Read articles can be stored in a special backlog buffer to avoid refetching (see Article Backlog).

      (setq gnus-keep-backlog 50)

- A clean copy of the current article is always stored in a separate buffer to allow easier treatment.
- Gnus can suggest where to save articles (see Saving Articles).
- Gnus doesn’t have to do as much prompting when saving (see Saving Articles).

      (setq gnus-prompt-before-saving t)

- `gnus-uu` can view decoded files asynchronously while fetching articles (see Other Decode Variables).

      (setq gnus-uu-grabbed-file-functions 'gnus-uu-grab-view)

- Filling in the article buffer now works properly on cited text (see Article Washing).
- Hiding cited text adds buttons to toggle hiding, and how much cited text to hide is now customizable (see Article Hiding).

      (setq gnus-cited-lines-visible 2)

- Boring headers can be hidden (see Article Hiding).
- Default scoring values can now be set from the menu bar.
- Further syntax checking of outgoing articles have been added.

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