In a gallery, when you go to "Add an Image", there are sometimes extra guidelines specific to that gallery (e.g. the "Anime / Manga" gallery has some extra instructions about posting anime with their own entries).
How can I add/change these guidelines? I'm the creator of the Trails / Kiseki entry, and would like to add some guidelines about spoilers to the image gallery.
Sorry if this has been asked before, but I couldn't find it anywhere.