Summary Agent Commands

J #: Mark the article for downloading (gnus-agent-mark-article).
J M-#: Remove the downloading mark from the article (gnus-agent-unmark-article).
@: Toggle whether to download the article (gnus-agent-toggle-mark). The download mark is ‘%’ by default.
J c: Mark all articles as read (gnus-agent-catchup) that are neither cached, downloaded, nor downloadable.
J S: Download all eligible (see Agent Categories) articles in this group. (gnus-agent-fetch-group).
J s: Download all processable articles in this group. (gnus-agent-summary-fetch-series).
J u: Download all downloadable articles in the current group (gnus-agent-summary-fetch-group).