Thanks, Tony. What you said makes sense, except that I don't have a media section or a camera on my left sidebar. I have to click on a rainbow-colored flower to get all my photos. Then I can select and drag the ones I want into my email.
What I don't understand is that in the past, as soon as I clicked on the paperclip (or on "Add Photos" to a Craig's List post), immediately my entire photo album would appear on the screen. All I had to do was to scroll and select the picture I wanted and then click "Select." Now that doesn't happen. I must have inadvertently changed a setting. I would like to go back to that default because it was more convenient than this system. Can you tell me how to change that setting? Thanks for your help.