For voxel meshes in MeshGeo, two tabs are available in the Create Voxel Mesh dialog (Voxel Mesh Options and Coarsen).

A third tab, Output Options is only available in MeshGeo -> Export Voxel Mesh or ExportGeo-CAD since the mesh is directly saved after creation. It contains the same options as Save Mesh in MeshGeo.

Click below for the descriptions about Voxel Mesh Options and Coarsen: