Adding and removing participants

Add someone

1. Open the group and tap its name to open Group info.
2. Tap Add.
3. Pick the people you want and tap Next.

Remove someone

1. Open the group and tap its name to open Group info.
2. Scroll to the members list and tap the person.
3. Choose to remove them.

New members do not see messages sent before they joined. Everyone sees a note when someone is added or removed.