HP LaserJet M4345 MFP - Software Technical Reference (external)
Page 208
... Update Now setting in a supported environment, set up this tab by default. Duplex Unit (for the specific device model. For the standard models, this feature, reinsert the media stack into the input tray to ...than one driver is enabled in the Automatic Configuration setting. The default setting is Off. The HP LaserJet M4345 MFP supports smart duplexing. The device uses the smart duplexing feature to print the second side. Allow ... or tray 5 is enabled by default. This setting is installed on the HP LaserJet M4345x MFP, HP LaserJet M4345xm MFP, and HP LaserJet M4345xs MFP models.
... Update Now setting in a supported environment, set up this tab by default. Duplex Unit (for the specific device model. For the standard models, this feature, reinsert the media stack into the input tray to ...than one driver is enabled in the Automatic Configuration setting. The default setting is Off. The HP LaserJet M4345 MFP supports smart duplexing. The device uses the smart duplexing feature to print the second side. Allow ... or tray 5 is enabled by default. This setting is installed on the HP LaserJet M4345x MFP, HP LaserJet M4345xm MFP, and HP LaserJet M4345xs MFP models.