LO version 5.3.6.1, on MacOS Sierra and on MacOS High Sierra. The Print function changes the orientation of the text. The original document is set to portrait as shown in Screenshot001.png:
When clicking on the print icon, the preview of the document still shows it is in portrait mode, but the text has shifted as if it were meant to be in landscape mode as shown in Screenshot002.png:
While still in the print screen, I selected “Save as PDF” from the lower left menu function. The pdf file generated has the text shifted as if in landscape mode, but the page is in portrait mode as shown in Screenshot003.png:
After exiting the print window, I selected the “Export as PDF” menu icon and the exported pdf file was as expected: the page layout and the text were all in portrait mode as shown in Screenshot004.png:
And by the way, for those of you on a Ketogenic diet, this recipe is delicious!