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Hello my name is ***** ***** I'll be happy to assist you today. There are little clips under those keys that hold them in place. If the clip didn't break when the key came off you should be able to snap the key back on by placing it in the position it would normally fit then pressing firmly on the key to snap it back in. If the clip is broken then you won't be able to snap it back on. You would then need to get another keyboard.