Hi guys, I’m pretty new to this.
I try to make a character for myself and there is a problem.
The question is, how can I separate the head and the body so I can get
detailer in the head part and the body part.
I tried to use sub-tools, but when I just divided the head and the body part separately to the higher level, I can see the gap between the body and the head.
How can I solve this?
Someone can give me a suggestion?
Thanks 
After splitting the two parts, before you divide press Tool>Geometry>Crease. This will tell ZBrush not to apply subdivision smoothing along the edges, which means they won’t contract and pull apart.
Thank you Aurick. Problem solved.