Need Help in Photoshop Please!

[amyjcaz]

I am hoping someone can help me. The two black tabs [within the black circles] suddenly showed up on my Photoshop workspace and I can't get rid of them no matter what I do. They are obnoxious and I have googled and searched and spent hours trying to remove them but I have had no luck... and I pride myself as one who can always figure these things out. Maybe I am having a lame-brain moment but I am going crazy here. They block parts of my layout and they won't even move!