To select the entire document in Document Display Mode, click the Document Header.
The check box next to the name of the document in the Document Header will also select the entire document.
If the document is already selected, clicking the check box will deselect the document.
If, when using Document Headers, you would like to add a document to the selection without deselecting the previously selected document(s), hold Ctrl as you select the new document.
To select multiple page ranges in multiple documents, hold Ctrl + Shift as you select pages.