In Design view, a document based on a template (a template-based document), editable regions appear in the Document window surrounded by rectangular outlines in a preset highlight color. A small tab appears at the upper-left corner of each region, showing the name of the region.
In addition to the editable-region outlines, the entire page is surrounded by a different-colored outline, with a tab in the upper-right corner giving the name of the template that the document is based on. This highlighted rectangle reminds you that the document is based on a template and that you can’t change content outside the editable regions.