If you have Editor or Administrator permissions, you can edit your order of service, including adding new songs or editing them, from the plan in Music Stand.
Swipe left on the item you want to edit, and then select Edit or Delete.
If you Delete the item will be removed from the plan, which cannot be undone.
If you choose Edit, you will be temporarily switched over to the Services app to edit the item.
Caution
If you don't have the Services app on your device, you will be prompted to install it before accessing the item settings.
Your files can be attached to the song, arrangement, or key. If you have a chord chart attached to the key, and you don't choose that key, that file won't be available in Music Stand.