If you're new (and not using a mydevice), then I'd mostly stick with item search. There's an app called SUBT used for pulling from the back, but don't use it if you haven't been properly trained. The 'NOP' function in RF apps is helpful, but can be confusing if you've never been shown how to use it. So stick with item search and if you need help pulling anything for a guest, ask another team member for assistance.