On the group chat's "Chat Details" page, you can adjust various settings:
Group Management: View group members, modify the group chat name, set the group avatar, set your nickname in the group, invite people to the group chat, view the group announcement.
Chat Settings: Set the chat background, pin the chat to the top, set message do-not-disturb, save the group to contacts.
Privacy and Security: Enable "Burn After Reading," enable "Screenshot Notification," disable private chat among group members (Admin function), allow new members to view chat history (Admin function), scheduled group message cleanup (currently unavailable).
Record Management: Search chat content (searchable by group member, pictures/videos, files, links, etc.), clear chat history.
Exit/Report: Delete and exit the group chat or report the group.