The missing icons happened as a result of my dumbly clicking one character but I do not know what I clicked or where I was when this happened. Normally, when I experiment with changing things, I will click on something, see what happens and if I do not like it, I just go back and undo it. In this case, I clicked something, the icons disappeared and I did not see it happen so cannot go back to undo but I certainly did not go through all the steps recommended in the AI answer so surely there is a better answer as to how to get all the icons back at the very top of each worksheet and further, I am not in Full Screen mode, so . . . ?