Improves navigation efficiency by allowing users to instantly jump to entries starting with a specific letter, reducing the need for scrolling or typing.

Speeds up lookup tasks for users who are searching for known individuals, especially in large listing of registrants.

Enhances visibility and accessibility since all filter options are always displayed, making it easier for users to understand how to interact with the list.

Supports quick scanning and encourages exploration, as users can easily browse by letter without committing to a search or filter reset - this can be especially helpful when checking in attendees.