How to undo Face Recognition

I was playing around and changed my security setting to unlock the phone to face recognition and pattern. The pattern is fine, but the face recognition doesn't work all the time
and I would like to disable it. I can't find any way to do this. Thanks.

Go to Settings-security-screenlock- and then change to your preference! :)

Thanks....it worked. I thought I had to actually cancel it, but I just had to choose another method and the face recognition was no longer necessary.