Mac desktop icons are missing
All my desktop icons disappeared. I am using Sierra and had been working with photos and burning DVDs when the desktop suddenly changed its appearance. I have turned off the computer several times, but when it opens the line going across only goes part of the way and then it opens. That makes me think it didn't complete the process so that the full desktop isn't there. Any suggestions would be appreciated.
[Re-Titled by Moderator]
iMac, macOS Sierra (10.12.6), Desktop icons disappeared