TO MAKE A VERTEX GROUP FOLLOW THE STEPS GIVEN BELOW:
1. Add an object, go to edit mode and sub divide the mesh once.
2. Go to the properties window in the right, and click on the data block icon which is high-lighted with blue color. Go
down to vertex group panel , click on the " + " sign in the right. A
"Group" will be added. Select some vertices, in the 3D window on the
object which you sub divided and press on the "Assign" button below in the Vertex group panel.. Now
the selected vertices will be assigned to a group called "Group" as a
default.
Click on the Group name, it will get into edit mode, delete it and add a new name like "Head-top".
3. The same procedure may be followed to create additional vertex groups.
4. Once vertex groups are formed, any vertex group may be selected here and used for further activities. One example can be adding hair particles to the vertex group called "Head top" to form the hair.
