I've been playing with some various setkey combos. I have <left> in
article view as extra quit key so I can exit back to group list quickly.
Similarly I have <right> bound to select_group in group view for the
same idea.

Now I want to make <right> in article view show article/post, but I
don't see where <space> and <enter> are bound in my .slrnrc file. Are
they hard-coded in for article view?

I've tried experimenting with various things like:

setkey article <command> "<Right>"

and tried a few commands like display_article, read_article,
display_thread etc but can't find the right one.

Anyone help with this?

Solved:

article_line_up and article_line_down display the article as well as scroll up/down.