How to change the file name that i used on last i add this number?

i want to change the file name that i added in las i visit here.....How to change the file name that i used on last i add this number?If you're talking about a mail file (folder) in Yahoo------????

Above the inbox is --Folders---{add-- edit}. Click edit and on that page, click %26quot;rename%26quot; on the folder you want.How to change the file name that i used on last i add this number?HOW DO I ADD PICTURE