It's most likely the app she is viewing it in. When you leave an area transparent on a printed product the color of the actual product shows as there's no ink there. With digital images, there's of course nothing to show through except whatever "background color" the viewing app/program uses to show transparency. It's usually white, black, or a grid pattern but it could be user-defined or the color/pattern of your Home screen that you see "under" the transparency ... Black text on a "black" trans background can't be seen, likewise white text on a "white" trans back. It's a variable neither Zazzle nor Creators can control. She needs to try opening/viewing it in another app. And since customers are free to edit and re-download , she can always go into the Design Tool, add her preferred background color which will then become part of the image, and then download it again, ensuring that whatever app people open it in, it will have the background color she wants as it's no longer transparent.
It's most likely the app she is viewing it in. When you leave an area transparent on a printed product the color of the actual product shows as there's no ink there. With digital images, there's of course nothing to show through except whatever "background color" the viewing app/program uses to show transparency. It's usually white, black, or a grid pattern but it could be user-defined or the color/pattern of your Home screen that you see "under" the transparency ... Black text on a "black" trans background can't be seen, likewise white text on a "white" trans back. It's a variable neither Zazzle nor Creators can control. She needs to try opening/viewing it in another app. And since customers are free to edit and re-download , she can always go into the Design Tool, add her preferred background color which will then become part of the image, and then download it again, ensuring that whatever app people open it in, it will have the background color she wants as it's no longer transparent.
