Env3 internal background question?

so when i want to select a picture for the external part of my phone, it allows me to 'scroll' around to select which part of the picture i want. however when selecting for the internal part, it doesn't do that? i was just wondering if there's any way to fix this and if it happens to anyone else. i have a picture i want to go under the eri banner so that i don't have to remove it, but i will if i have to(: thanks!