How to see created/modified timestamp of an item or node?

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How to show created date (or modified, etc)

How can I show, copy, or export the time stamps for when I created or edited an item? Sometimes I want to see when I created or modified an item. The hover functionality is useful, since I wouldn’t want to see it all the time. However, sometimes it would be helpful to have this data visible or transferable. Is there a way to do this, either in the main app or with some CSS, or something else? Thanks!