These settings, found both under the File menu and under the Maintenance menu, allow customization of the way things print. Note that these settings are workstation-specific -- that is, if you are using multiple workstations on the network, changing the printer settings on one workstation will not affect the printer settings on other workstations.
Printer Setup -- Before printing receipts, you should go to File / Printer Setup to configure the appropriate printer (especially if using a 3" roll paper receipt printer). See the chapter "Setting up your Campground Database" for details.
P.O.S. Note: If the P.O.S. option is enabled, then there will be additional tabs on this dialog. See the P.O.S. Setup section for details on those settings.