Set size. You can specify a global element size for the remesh procedure. Abaqus/CAE changes the density of the new mesh to reflect the new target element size. You can change the element size if the mesh contains either linear or quadratic elements.
Remove size. You can maintain the global element size during the remesh procedure. Abaqus/CAE maintains the edges of the elements along the boundary of the part while improving the mesh quality in the interior. You can refine the mesh if the mesh contains either linear or quadratic elements.
Remesh. You can remesh a planar mesh containing linear or quadratic triangular elements.
For detailed instructions about mesh refinement, see Editing and refining an orphan mesh.