Themes, Wallpapers, background pictures are few ways ... While you can use the images for almost anything, the website restricts to redistribute Gratisography pictures, including on other stock ...

You can add reference images and set how the AI should use them, control the size and layout, even add a transparent background. Most of these features are available in other platforms ...

Clicking on Get More Themes in Microsoft Store will take you to the official website of Microsoft ... drop-down menu of Background, and set the desired folder with your images.