Set the subobject selection filter to select only faces: right-click anywhere in the drawing area. Click Subobject Selection Filter Face.
Click
Modeling tab > Mesh panel > Mesh Refine.
Click one or more mesh faces that you want to refine. Press Enter. (The object must have a smoothness level of 1 or higher.)
Each face is subdivided into four new faces.
Refine a Mesh Object
Click
Modeling tab > Mesh panel > Mesh Refine.
Select the mesh object that you want to refine. (The object must have a smoothness level of 1 or higher.)
The underlying mesh facets are converted to faces, and the level of smoothness for the object is set to 0. Higher levels of smoothness result in a higher number of faces.