Thanks for the replies. I did go into options and unclick the preview pane and it worked. Interestingly though, it did not seem like that was an option - but regardless it's back to normal again. I do not have the "paid" version of yahoo, just basic. Thanks for help. :yay:
Inbox now only shows a few email and when I attempt to open the open email appear below those in the inbox - not a separate window. I rebooted computer but no change
Thanks