Hi all,
I'm trying to understand how I can edit element density after meshing (either solid meshing, or hex meshing, or tetra meshing, or 2D meshing)
The Density icon is always faded out, and I can't select it.

If I choose from the mesh ribbon Edit Elements, it's choosing me only several edges but they are blacked out and I can't change the node density

What are the criteria for choosing the elements for edit? Or do I have to delete all the elements and start again?
Thanks in advance