HP LaserJet Enterprise 500 Color MFP M575 - Manual (Page 151)

Copy on both sides (duplex)
Copy on both sides automatically
1. Load the original documents into the document
feeder with the first page facing up, and with
the top of the page leading.
2. Adjust the paper guides to fit the size of the
document.
3. From the Home screen on the product control
panel, touch the Copy button.
4. Touch the Sides button.
ENWW Copy on both sides (duplex) 135