New to Yahoo Mail? You'll find that Yahoo has a lot of the same features that other email providers have, as well as a few extra ones as well. Here's a basic overview of the things you'll see when you access your Yahoo mailbox.
Your created folders are found along the left side of your mailbox. You can put messages in here (using the Move icon or drag-and-drop) to organize them better. Click the New Folder text to create a new folder.
Just above the first message in your mailbox you'll see the top checkbox. This allows you to select all visible emails in your mailbox. The Sort button lets you organize emails by Age, Sender, Date, Unread, Starred, Subject, or whether it has attachments or not.