I would like to change back to the Clic yahoo e-mail page?

I have been using the "old" clic yahoo e-mail format, you formerly had an icon that permitted me to change my style of e-mail, yesterday I changed high speed providers from century link to com-cast and my email was switched to the new top over e-mail Format when the provider changed. I wish to change back to the old clic Format- larger reading area.