HP Officejet Enterprise Color X585 Multifunction Printer series - Manual (Page 127)

4. Lower the platen by pressing down on the green
tab. This will cause the product to try to feed the
sheet through the print zone. You might need to
gently pull on the sheet if it does not feed.
Remove the sheet.
5. Lift the green tab to place the platen back into its
operating position.
ENWW Clear jams 117