On a Mac, how do I turn off double sided printing?

[RichS1]

I have a new iMac. The printer works fine. But it only prints double sided. How do I turn it off to only print 1-sided original to 1-sided copy? Apple Support says, since the printer is working but doesn't want to listen to changes in settings, this is an HP issue. 

[ShlomiL]

Hi,
Follow these steps to disable two sided printing:

Open the file you would like to print. From the File menu select Print. The Print window appears.

NOTE: The Print window might be minimized. Click the Show Details button to see all available settings.

Click the settings drop down, it will usually appear as the name of the program (e.g. TextEdit)
Will appear as Copies & Pages within Microsoft Office applications.

Select Layout from the drop-down menu.

Set the Two-Sided option as Off.

You may save the settings as a preset by clicking Presets > Save Current Settings as Preset...

By doing so and completing the print job these settings will remain default till another preset will be used in the future.

Regards,
Shlomi

[RichS1]

This helped, but with modification that others might want to know about. I do not have a "Show Details" button. But this is what I did:

1. Open a document you want to print.

2. Go to "File > Print" or "Command-P." A Print window opens.

3. Click on "Copies and Pages." Options open.

4. Click on "Layout." Near the bottom, notice "Two-Sided."

5. Click on the arrows for "Two-Sided."

6. Click "Off."

7. Click "Print." Problem solved!