How to i delete all mails in my yahoo inbox at a time

Hi fnds,
For this Question earlierly they have no option to delete all mail in our yahoo inbox at a time, Better u can increase the number of mail visible in inbox as 200 & select the sender check box option & delete all mail, this is one way. Other than this yahoo give option to download our all mail into Pop3 accounts & delete it.
But now, new Yahoo beta version, have this option to delete all emails at a time, this new yahoomail screen looks like Outlook express in this very easy to check mails.

Is there any other suggestions, reply to this post, we ll upgrate it.