there is a knob on top of the camera - press it and dial at the same time for
bracketing gaps (front dial) 0,33 stops 0,67 stops or 1 stop ( no 2 stops sorry)
or
amount of exposures ( rear dial) 2 exposures -1, 0 or 0, +1 - No bracketing- 3 exposures -1, 0, +1 5 exp... 7 exp... 9 exp..
it is quickly done as soon you are familiar with it.. but -2, 0, +2 does not exist-
it will be 5 exposures