Shortcut to allow engine to take extra move

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Avatar of Luft4591

There is a shortcut that helps figure out the point of an engine's move. What it does is to tell the engine to make another move without it's opponent taking his/her turn. 

I don't remember the shortcut or any other way to access this. I have Chessbase 17 and Fritz 17.

Does anyone know the shortcut?  Thanks.