Welcome to Librarium Online!
I'm here just looking for a little help. If any of you would be so kind as to tell me how to delete a post/thread, that would be super. Thanks.
You cannot delete your post, only what it contains.
In the bottom right of your post, see a little grey button with a pencil on it? thats the edit button, use it wisely (i.e it saves double posting).
Just hit that and mess around with your post as you see fit.
IIRC on Admin (possibly supervisors) can delete threads, us users cannot.
Hope this helps.
As Outsider said, deletion can only be done by moderators with authority for the forum or admins/supervisors/supermods.
You can empty a post using the edit option but only if it is your own post, if you wanted it deleted, either delete the content and replace with a request for its deletion by a mod, or PM a mod and ask him to delete it, or report the post (a bit cheeky and point out it is your own and that it was a mistake and ask to delete
Everything you have been told is a lie!