Select Page setup... from the File menu to change the margins and paper size settings used when the puzzle is exported to PDF.
Set the margins for the top, bottom, left, and right edges of the page.
Choose the paper size for PDF output:
For standard paper sizes, you can select Landscape orientation to rotate the page 90 degrees.
When Custom is selected, you can enter specific width and height values.
Note: These settings apply to PDF exports, not printing.