ERPstuff - Oracle EBS Community

We know that Oracle have all of People Type and we can use manual or automatic numbering for all different type of people,
My Question: Can we setup Manual numbering in Business Group and we use automatic numbering by using Person type?.

Also if we setup employee number as <b>manual </b> can we change it to <b>automatic</b>, or if we setup it <b>automatic </b> can we change it to <b>manual</b>?.