The imported images are live and not remembered. There is something to be said for importing background images into a library, but in reality, that library would need a whole management layer, and a whole sync layer on multiple devices, so that single feature would take us months to do. And you already have that feature in your Camera Roll/iCloud/Dropbox/Google Drive etc. Just import the image you want, and to change it, you import another image.
The numbered cameras are simply the cameras on your device, usually 3-4 rear-facing cameras, and 1-2 front-facing cameras. Just select them, and you'll see.
Hi,
The imported images are live and not remembered. There is something to be said for importing background images into a library, but in reality, that library would need a whole management layer, and a whole sync layer on multiple devices, so that single feature would take us months to do. And you already have that feature in your Camera Roll/iCloud/Dropbox/Google Drive etc. Just import the image you want, and to change it, you import another image.
The numbered cameras are simply the cameras on your device, usually 3-4 rear-facing cameras, and 1-2 front-facing cameras. Just select them, and you'll see.