Used to be able to select & view mail from one person.

Used to be able to select & view mail from one person.

I remember being able to select and view all mail (new) from one person by clicking on their name. I would select the name and the page changes from all new mail to only the one mailer i have selected.

I can't do that anymore, was that an option that was just removed? Is there an option in settings that i would have to pick? I can't seem to find it. Would like some help on this. Thanks.