The following commands are available in the Gnus summary buffer:
If there is no article selected, select the article on the current
line and display its article buffer. Otherwise, try scrolling the
selected article buffer in its window; on reaching the end of the
buffer, select the next unread article (
Thus, you can read through all articles by repeatedly typing SPC.
Scroll the text of the article backwards
Select the next unread article
Select the previous unread article
Do an incremental search on the selected article buffer
gnus-summary-isearch-article), as if you switched to the
buffer and typed C-s (see Incremental Search).
Search forward for articles containing a match for regexp
Search back for articles containing a match for regexp
Exit the summary buffer and return to the group buffer