Search Filters, Anonymous Group Admins, Channel Comments and More
Search Filters
• Search messages by type, date or source using the new filters in Global Search.
• Use tabs to browse all media, links or documents you've ever sent or received.
• Filter search results by date (like "July 2015" or "Apr 4") or source (people, groups, channels, bots).
Anonymous Group Admins
• Turn on "Remain Anonymous" in an admin's Permissions to let them post on behalf of the group and become invisible in the list of members.
Channel Comments
• Comment on posts in channels that have a discussion group.
• Get notified about replies to your comments via the new Replies chat (if you are not a member of the discussion group).
• Visit @durov to check out the new channel comments.
Silent Messages, now in Secret Chats
• Send messages silently in Secret Chats by holding the Send button.
More about this update:
https://telegram.org/blog/filters-anonymous-admins-comments