Is it this one **LINK**?
The only thing that might catch you out is the black knob in the middle of the 3 armed down feed control. This is tightened to lock it to the fine downfeed wheel on the front and loosened to release but these things sometimes need a nudge to make them actually release. After setting the height with this when milling lock the quill (the bit that moves up and down) with whatever knob or lever you can find probably on the left of the head before starting to cut.
The rest is obvious.
Welcome ot the forum but please make the titles of your posts meaningful so that people can find them in the future otherwise we end up with 500 posts all 'help'.