Many people have asked how to use ePMV's Selection Manager section of the GUI. Its a bit tricky, but very powerful. You can select and visualize individual/ranges of atoms, residues, atom types, manual selections made in the host, etc.
The new [ ]Show selection box in v0.5.2 makes selections relatively intuitive as long as you follow a few specific protocols. We've posted a basic selections tutorial in the General Tutorials section to get you started.