Barry, did you check out the help on chats?
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It does discuss editing chats, deleting an individual chat message, deleting a chat.?
Does deleting an individual chat message accomplish what you want?
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You also ask about resetting the activity log back to the beginning of the count - starting again with the whole presentation.?
Have you looked at reopening a closed chat?
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And you mention moderation of chat feature.?
Help says: ?Group owners determine whether the Chats feature is available in their groups and, if it is, who can create new chats: all members or only owners and moderators.
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All group members can participate in chats. 开云体育 does not provide a “private” chat option that allows chat creators to restrict chats to subsets of group members.
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So no moderation. But you can delete a chat message after the fact. Not sure how helpful that is if someone is participating live.
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I haven't used chat in ? Hopefully others will be able to give more advice!
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Frances
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Frances