in the toolbar, then click Document. If the Document Body checkbox is deselected, the document is a page layout document.
A page layout document is essentially a blank canvas to which you add text boxes and other elements and arrange them however you want. If you turn a word-processing document (like a letter, which is primarily text) into a page layout document, the body text area is removed to create the blank canvas.
Some Pages templates are designed specifically for page layout. To see whether an open document is set up for page layout, click in the toolbar, then click Document. If the Document Body checkbox is deselected, the document is a page layout document.