The reddit mode provides a 'cursor', represented by highlighting a specific reddit entry or comment in green, which can be moved up and down to interact with reddit items.
'j' is reddit-next: Move the 'cursor' to the next reddit entry or comment.
'J' is reddit-next-parent-comment: Move the 'cursor' to the next comment which isn't a child of another comment.
'k' is reddit-prev: Move the 'cursor' to the previous reddit entry or comment.
'K' is reddit-prev-parent-comment: Move the 'cursor' to the previous comment which isn't a child of another comment.
'h' is reddit-open-comments: Open the comments-page associated with the currently selected link.
',' is reddit-vote-up: Vote the currently selected link or comment up.
'.' is reddit-vote-down: Vote the currently selected link or comment down.
To open the current link, you can use return (open in current buffer) or o (open in new buffer). The copy command (bound to c by default) copies the URL of the linked article.
The reddit mode uses reddit_keymap.
Controls what action is taken by the commands reddit-next-link and reddit-prev-link at the last or first link, respectively. The value is given as a string. Supported values are stop, wrap, and page. The default is stop, which results in a null-op. wrap causes the highlight bar to wrap to the other end of the list. page will make the commands go to the next (or previous) page of links.