spacing in shape dynamics

hey guys,

i am following along in LYDAN.COM a pixel playground tutorial on how to make ginger cookies. In the video Bert makes adjustments to spacing in the brush dynamics panel, see below. however, that option is not there in CC2017. In the video Bert us using CC2015. where is spacing in cc2017?

This is what it looks like in the video (cc2015):

however, this is what i see in 2017:

thanks