Page Margin

The page margin usually delimits the column headers, the page number, the paragraphs, and even the sheet signature mark from parts that do not belong to the text, such as handwritten additions or the whitespace. Marking the page margin is preferable to the type area.

Figure 1. Example: page margin
Figure 2. Example: handwritten additions

This example also shows a particularity. In this case the addition "1885" is included within the page.