Reply To: Document that contains landscape pages – how to output?

Select the content and Ctrl + click, select transform / rotate and enter degrees to rotate – 90 ?
Make sure you have correct reference point selected in the control bar (top left) so content rotates on the correct point. You can also use rotate command from the toolbar.
You don’t need to set copy at wrong angle to be able to read / edit, just use page rotation to view.