You can specify the paper orientation (portrait or landscape) and the margins directly in the page layout.
Select the right format via the paper symbol.
Click on the margin line on the respective side of the page and drag it to change the margin size.
It is often useful to print overview timetables on A3 size paper. If your printer supports printing on A3 paper, proceed as follows:
Set your printer to paper size A3 (under 'Print | Prroperties'). If the A3 printer has been set as the default printer in the Windows Control Panel and if A3 paper has been set as the standard paper feed in the printer driver, the timetable will automatically be printed in A3 format.