Change the paper size when printing
If you want to change the paper size of your document (for example, print a US Letter-sized PDF on A4 paper), you can change the printing format for the document.
Open the print dialog by pressing Ctrl+P.
Select the Page Setup tab.
Under the Paper column, choose your Paper size from the drop-down list.
Click Print to print your document.
You can also use the Orientation drop-down list to choose a different orientation:
Portrait
Landscape
Reverse portrait
Reverse landscape