The body section of a page
If you have inserted either a header or a footer element to a page element, then a body element is also added:
The body elements contains the elements, that should only be executed/inserted once. This section normally includes the detail lines of your input file.
You here normally use the repeat element to iterate across the detail lines of your input file and a page overflow is triggered, when there is no more room for additional detail lines.
The size and position of the page body
The body is positioned between the header and the footer of the page element. If one or both are not created, then the body will start on the top of the page (respecting the margin of the page) and flow down over the page.
The normal way to specify the height of the header and footer is with a dynamically placed container element. You simply drag in the bottom corner of this container to change the height or specify the dimensions in the attribute.
The normal elements in the body should be placed dynamically, but you can also place elements outside the body if you like, but such elements must be placed in a fixed position.
Example video: Size of the header, body and footer
This video shows how the size of the header, body and footer can be set:
