Content Rules define the editing permissions for users of a Job.
Typically, users can change only the text characters in a Job. If users should also be permitted to do more, such as change the styling, replace an image, etc., these permissions need to be defined as Content Rules.
Settings > Content Rules
Expand the main Navigation menu, and click on Settings > Content Rules.
This opens the Content Rules (Policies) dialog.
There will be a Content Rules folder present by default, which contains a set of Content Rules named Allow All.