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You can choose a printer in two ways: on the 'Options/SettingsSession/Printer' dialog or on the 'FileQWS3270/Print Setup' dialog from the QWS3270 SECURE menu.
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To temporarily change the printer settings (for the current session only, until you disconnect), choose the 'QWS3270/Printer Print Setup' menu option. A dialog similar to the following appears. The printer selections in this dialog and the settings options depend on the types of printers installed on your system.
To choose an alternate printer, select one from the printer name dropdown listbox. Change the other selections as appropriate and click OK to make this printer the default printer for this session.