Bucketing long lists by first letter

If a level grows too long to scroll comfortably on a phone, it can bucket by first letter — insert an A, B, C, … layer above the entries so you pick a letter first. It's set per field inside a template, from the field's context menu: Split [field] by their first letter. Leave it off for short lists; turn it on for the levels — usually artists — where the list is enormous.