The poll one is the only one that needs the URL change cause it doesn't have a button. The rest, like editing title, contents is just by clicking the edit button on your thread, then clicking more options. Don't know if there are others, don't really see what others there could be.
If you have made the poll already, then you can edit it with the button at the top right of the thread. If you didn't add one, just add /poll/edit onto the end of the thread URL to add one.
I may be wrong, but I believe this is reserved for staff... @Lord_Roke
Although you can report your thread and request a delete as long as there is a valid reason.
Comments on Profile Post by Lekosa1