I'd like to print a picture in my phone gallery. How do I use this device as a photo printer?

You can use the app on your device to print pictures. Follow the steps below:
1. Open the KODAK Photo Printer app.
2. Select "Gallery" and load a picture of your device.
3. Select the picture you want to print.
4. Select the desired number of prints.
5. Click the "Print" icon in the upper right corner.