Add a meshing region in to the Meshing Setup tree

Select that region to be added in the View window.
The region is highlighted in red.
Select the type of region to use.
Specify a unique Region Identifier to use for the new mesh region.
(Hole or Control Region) Select the previously defined boundary name into which the Hole or Control Region will be add.
Specify a target maximum element size (with units).
Select to optimize the meshing for area.
Click Add.