The message is immediately marked as read. To read an email double click the message, and it opens so you can read it.
The figure in parenthesis next to the inbox is the number of unread messages in the inbox. Unread email is shown in bold, and email that has been read is shown in normal type. Messages will generally be marked as read after a short time of being previewed. This preview can be turned off, and the pre-view position changed using the view menu. Generally if you select a message (shown in grey) then a preview is shown in the preview pane under the inbox messages. With message preview enabled you can see and read the opening paragraphs of the message in the preview pane without having to open the email. Incoming Email is normally placed in your inbox. In this tutorial we look at how to read, Reply and forward emails using The Yahoo Web Browser client. How To Read, Reply And Forward Email -Yahoo Mail