34.1.1 File/Read/Mesh...

The File/Read/Mesh... menu item opens the Read Mesh Options dialog box (see Section  4.2) which allows you to read or replace a mesh.

Controls

Options   allows you to read in a new mesh or replace the existing mesh.

Discard Case And Data, Read New Mesh   results in both the case and data files beig discarded when reading in a new mesh.

Discard Data, Replace Mesh   results in the data file beig discarded when replacing an existing mesh.

Show Scale Mesh Panel After Replacing Mesh   gives you the option to have the Scale Mesh dialog box appear automatically for you to check or scale your mesh.