Finally! Cracked Insert

Finally, last night, the Insert penny dropped! To get images inline two conditions need to be met:

  1. the Content Type must have a File Upload field included at Home > Structure > Content types > Travel > Manage fields. The example here is the Travel Content type where the label is Add Image.
  2. At the bottom of the Travel settings is (contracted) the Insert control. Expand it and tick the Enable insert button box.

Then a couple of hours of fiddling determined how to hide the Add Image file attachment when viewing. How to pick an image style for the insertion. Now I think I need to learn how to configure styles so that a thumbnail is positioned as desired and is enlarged in Colorbox when tapped.