Before generating the 2D mesh, there are two items that can be specified to control the mesh size in specified areas: Edge Divisions and Refinement Points.
In some situations, you may want to control how many elements are created along a particular edge. You can do this by selecting the construction object and right-clicking. Select the 2D Mesh Divisions command. The Sketch Entity Mesh Division dialog will appear. Activate the Specify division check box and type the number of divisions that you want to be made along the selected edge. The number of divisions can be fewer than what the mesher would try to create, but a better mesh will be created if the number of divisions is approximately the same or more than the number of divisions that the mesher will create (based on the mesh size).
2D mesh generation matches the mesh between different parts only if the parts are meshed simultaneously. Parts meshed separately in different planes normally do not have matched meshes.
Refinement points specify a region in which the 2D mesh generation will create a finer mesh. The input is identical to the refinement point dialog described for CAD solid models. Refer to the Refinement Points page for details.