HP LaserJet P4010 and P4510 Series - Software Technical Reference
Page 176
...duplexing feature increases printing performance by preventing one-page print jobs or single-sided pages of the media because the HP LaserJet P4014, P4014n, P4015n, P4015tn, P4515n and P4515tn printer models do not have a duplexing unit installed. To make the Print on...driver. The printer comes with each media type. Print-mode adjustments for media types that are supported for automatic duplexing (Letter, A4, Legal, and 8.5x13 only), and forces manual printing on both sides (such as cardstock and thick media. A different print mode is set to print on both sides for Windows...
...duplexing feature increases printing performance by preventing one-page print jobs or single-sided pages of the media because the HP LaserJet P4014, P4014n, P4015n, P4015tn, P4515n and P4515tn printer models do not have a duplexing unit installed. To make the Print on...driver. The printer comes with each media type. Print-mode adjustments for media types that are supported for automatic duplexing (Letter, A4, Legal, and 8.5x13 only), and forces manual printing on both sides (such as cardstock and thick media. A different print mode is set to print on both sides for Windows...