When you tell the picture etc to print, there is a button on the print screen that says printer options or preferences. If you click on it, under page set up it will have a media type or somewhere about how you wanted it to print. Click on mirror image or t-shirt transfer for it to print.
Also if you have something like Printmaster or other desktop publishing software, there is an option under one of the tabs for flipping the image left to right. I used this one this week. I love using Printmaster because I can resize the image and get it just right.
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