Editable template regions control which areas of a template-based page a user can edit. Before you insert an editable region, save the document you are working in as a template.
You can place an editable region anywhere in your page, but consider the following points if you are making a table or an absolutely-positioned element (AP element) editable:
You can mark an entire table or an individual table cell as editable, but you can’t mark multiple table cells as a single editable region. If a <td> tag is selected, the editable region includes the region around the cell; if not, the editable region affects only content inside the cell.
AP elements and AP element content are separate elements; making an AP element editable lets you change the position of the AP element as well as its contents, but making an AP element’s contents editable lets you change only the content of the AP element, not its position.