I noticed that some people are unaware of this.
At the bottom of each of your posts, there are, from left to right: a (relative) time-stamp (e.g., POSTED 5 MINUTES AGO),
a “#” symbol, which holds a link to that specific post, and,
for the first 25 minutes after you’ve put up the post (whether it has been approved or not), an EDIT button. Clicking it will re-open the post for writing. Editing a post will not cause it to be time-stamped later – it will always keep the original time-stamp and place in the order of posts (though it will be temporarily invisible after editing – see below).
Be aware:
1. If it was an already-approved post, editing it will send it back into moderation, and in the case of rejection, it is not only the edit that will disappear, but the entire post.
2. The 25 minutes to edit will run out on an as-yet-unapproved thread-starting post, which cannot be edited.
Post at a time when you see recent time-stamps on the posts at the top of the main list to avoid this issue (or just proof-read).
3. If the 25 minutes run out while you are editing, when you click the publish button (“Edit Post”), you will get the error message “Sorry[;/:] post is too old.” (I’ve forgotten which symbol it is.) That is, it’s 25 minutes to change, not 25 minutes to decide to change with unlimited editing time.