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Can we PIN or MOVE a Comment within a Discussion to prioritize it?

Functionality

Comments

Sorry, but I do not think that there is anything I can suggest, Discussions are by nature a thread and appear in the order they are created.  You can have more that one discussion thread bu again they appear in the order they are created oldest at the bottom, Newest at the top.

Possibly you could have a text column in the sheet that gives the users soe indication as to which discuussions are current and important.