I cannot find an option to set the paper size when using LibreOffice 5.02 Writer with Mavericks (MacOS 10.9.5)? There is no page setup option under File. There is no Paper Size option in the Print Menu. Printing defaults to Custom which produces bad results. I’m stumped.
Try the menu option Format and then select the drop down option
where you should see a window with several tabs one of which is Page
there you are able to change the page size