Click the "File" > "Print" button, and the print dialog pops up.
This dialog is the final step before printing. You can modify the printer in this dialog as well. Be aware that changing the printer may affect the page setup if the newly selected printer has a different paper size. For instance:
Clicking the "Printer Properties" button next to the "Printer" option, you can set the page "Orientation" to be Portrait or Landscape, set "Page Order" and "Page Format". Clicking the "Advanced…" button, you can set the "Paper Size", "Print Quality", "Scaling", etc.