The appearance of Mail running on my 2014 i
The appearance of Mail on my 2014 iMac i7 Retina running Yosemite has suddenly changed with the upper command bar missing. So I cannot access account information from within Mail nor can I quit the program as previously. How can I change it back?
iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10.3), 4GH i7, 8GB Mem, AMD Radeon M295X 4