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Gnus Manual

2.16.1 Topic Variables

Now, if you select a topic, it will fold/unfold that topic, which is really neat, I think.

The topic lines themselves are created according to the gnus-topic-line-format variable (see section 8.4 Formatting Variables). Valid elements are:

`i'

Indentation.

`n'

Topic name.

`v'

Visibility.

`l'

Level.

`g'

Number of groups in the topic.

`a'

Number of unread articles in the topic.

`A'

Number of unread articles in the topic and all its subtopics.

Each sub-topic (and the groups in the sub-topics) will be indented with gnus-topic-indent-level times the topic level number of spaces. The default is 2.

gnus-topic-mode-hook is called in topic minor mode buffers.

The gnus-topic-display-empty-topics says whether to display even topics that have no unread articles in them. The default is t.