On Whippet World you have the ability to edit or delete your post for up to 30 mintues after you submit it. This gives you time to update, change your mind, or fix spelling or grammar errors (if you so choose).

To edit your post click on the 'edit' button (which will be visible at the bottom your post next to the quote button for 30 minutes from time of posting), make the appropriate edits and then click 'submit'.
To delete your post click on the 'x' (which will be visible above the 'quote' button at the bottom of your post for 30 minutes from time of posting). A window will pop up asking if you're sure you want to delete the post, click yes if you wish to continue and delete it.