Hi colemacj.
If you are using a Mac computer, it is recommended that you save the 1-sided option as a Preset. Please set the options for 1-sided and monochrome, and then follow the steps below to create the preset:
1. Click the "Presets" drop-down arrow and click "Save current setting as preset."
2. Name it "1-sided" or "Single-Sided" and verify that the imageCLASS MF731Cdw is the only printer selected.
3. Click "OK".
4. Print the document.
If you are using a Windows computer, please open Control Panel > Devices and Printers. Next, right-click on the MF730 Series and select Printing Preferences. Set the 1-sided/2-sided setting for "1-sided", and change Color Mode to "B&W Printing". Next, click OK. The setting should be saved for all programs. Please note that some programs can override the printer settings.
If you require any further assistance, please call us at 1-800-OK-CANON (652-2666), Monday - Friday 10:00 a.m. to 6:30 p.m. ET (excluding holidays).