How to change the background color of a QR code?
1. Click on 'Design, Color and Decorate QR Code' to open the 'Customize QR Code' popup.
2. Go to the 'COLORS' tab. Select the 'Background Color' checkbox and then select the background color.
3. To make the background rounded, go to the 'SHAPES' tab. Select the 'Rounded Background' checkbox and adjust the slider's position.