Load an original document faceup, short edge first into the ADF tray or facedown on the scanner glass.
If you are loading a document into the ADF tray, then adjust the paper guides.
From the home screen, navigate to:
Copy > Copy from > select the size of the original document
Copy to > select a new size for the copy > Copy It
Note: If the selected paper size is different from the “Copy from” size, then the printer scales the size automatically.