Options do not appear in iTunes to backup iPhone 6.
The left side of screenshot is my Mac computer. The right is a photo of the instructions I tried to use. As you can see in my iTunes the options to backup are absent. I do not get a "Summary" button. Can anyone tell me what to do? I had contacted Apple Support before and was told me it has to be there.
iPhone 6s Plus, iOS 11.2.6, Mac 10.13.3