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IntelliJ doesn't autocomplete for me like in this video. How do I turn that on?

In the video you can see the instructor finishing the statement using autocomplete when IntelliJ guesses what he wants correctly. That doesn't seem to be working for my hibernate.cfg.xml file. I did my best to just copy what he wrote, but I know it would help me in the long run to know how to turn this on and off. And just to confirm, Power Save Mode is not on.