A few ideas about the mesh refinement regions,...

[afshin2012]

1- Assign a unique color to each mesh region, this would help adjusting the sizes and relocating the regions.

2- Show region number under Mesh History in Design Study Bar, also show that number on the graphic area.

3- When editing an existing region the old one is still in the design tree (the old one doesn't get updated somtime).

4- Under Mesh History in Design Study Bar, there should be a "Spread changes" check box for each individual region, but usually there is only one for all,... 

5- Editing a region from the Mesh History (under Design Study Bar), the manu is different than the menu available in "Automatic Sizing" in the "Panel Buttons", and the spread changes button is missing!.

Also the mesh size text box is not responsive and won't get updated correctly.

[ryan.arnaudin]

Thanks for the feedback, good ideas!

I'm opening this to comments so others can add their thoughts as well.

[OmkarJ]

My grief with regions is that there is a stair-step behaviour of the mesh count. That is, if you keep reducing the size of the region, the mesh count doesnt change and a particular value it increases drastically. This means that an adequate control on mesh density AND mesh elements count is not achieved.

[LKania]

Have you tried using the alternate volume mesher? This is activated via the checkbox in the Advanced panel within the meshing task.