To Modify a Mesh Subobject in the Properties Palette
If the Properties palette is not displayed, select any object. Right-click the object and select Properties.
Press Ctrl+click the mesh face, edge, or vertex that you want to modify.
Note: If you cannot select a specific subobject, verify whether subobject selection filtering is turned on for a different subobject type. (Right-click in the drawing area and click Subobject Selection Filter.)
In the Properties palette, modify the properties you want to change.