>Michel, the Time Warp function makes it possible to return to a former state. Is it possible to build a function that does this job somewhat differently?
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>What I have in mind is a function that goes back to the situation an x number of refreshes back. Suppose I get certain messages now and then click F5, then the new list of messages will no longer contain the messages that were already shown. However, occasionally I want to see also those messages again. Suppose it was only 2 minutes ago, the Time Warp function's 2 minutes will not bring back the already shown messages. Rather, it will show all messages that were created in those 2 minutes. At least, that's how I interpret its functioning.

Correct, the time warp goes back in time and returns new messages since then which is not related to the user account as far as previous states go. In order to do that, we would have to store the state of each user's refresh for a certain amount of time.