How do I print my document as A3?

• To print in A3 your document will need to be created in A3
• Click Layout on the ribbon 
• Click Size
• Choose A3 from the list
  
• Create your document

When you are ready to print you will also need to change the print size to A3

• Click File
• Click Print
• Under Settings, select A3 from the dropdown
  
• Your document will now print in A3