Prompt for a new topic name and create it (gnus-topic-create-topic).

Move the current group to some other topic (gnus-topic-move-group). This command uses the process/prefix convention (see Process/Prefix).

Copy the current group to some other topic (gnus-topic-copy-group). This command uses the process/prefix convention (see Process/Prefix).

Remove a group from the current topic (gnus-topic-remove-group). This command is mainly useful if you have the same group in several topics and wish to remove it from one of the topics. You may also remove a group from all topics, but in that case, Gnus will add it to the root topic the next time you start Gnus. In fact, all new groups (which, naturally, don't belong to any topic) will show up in the root topic.

This command uses the process/prefix convention (see Process/Prefix).

Move all groups that match some regular expression to a topic (gnus-topic-move-matching).

Copy all groups that match some regular expression to a topic (gnus-topic-copy-matching).

Toggle hiding empty topics (gnus-topic-toggle-display-empty-topics).

Mark all groups in the current topic with the process mark (gnus-topic-mark-topic).

Remove the process mark from all groups in the current topic (gnus-topic-unmark-topic).

Either select a group or fold a topic (gnus-topic-select-group). When you perform this command on a group, you'll enter the group, as usual. When done on a topic line, the topic will be folded (if it was visible) or unfolded (if it was folded already). So it's basically a toggling command on topics. In addition, if you give a numerical prefix, group on that level (and lower) will be displayed.

``Indent'' the current topic so that it becomes a sub-topic of the previous topic (gnus-topic-indent). If given a prefix, ``un-indent'' the topic instead.

``Un-indent'' the current topic so that it becomes a sub-topic of the parent of its current parent (gnus-topic-unindent).

Kill a group or topic (gnus-topic-kill-group). All groups in the topic will be removed along with the topic.

Yank the previously killed group or topic (gnus-topic-yank-group). Note that all topics will be yanked before all groups.

Rename a topic (gnus-topic-rename).

Delete an empty topic (gnus-topic-delete).

List all groups that Gnus knows about in a topics-ified way (gnus-topic-list-active).

Edit the topic parameters (gnus-topic-edit-parameters). See Topic Parameters.