@tig said:

To see the surface's edges you could use View > Hidden Geometry > ON
They'll then be visible but dotted, and the facets forming the surface become 'separate'.
Any smooth/soft/hidden edges can be seen dotted, and selected/edited etc...

If you want them as solid edges...
To change them all to solid edges [with the setting View > Hidden Geometry > ON], use the Smooth tool [context-menu] and set the slider to minimum, all edges should turn to solid.
If some do not change the original author might have also 'hidden' them.
To fix those select all of the edges and context-menu > Unhide...
Now all edges should be solid, dividing the surface into its facets.
All smooth, soft and hidden behaviors having been removed

Thank you!

I'm working with a model created by someone else, and will need to be doing lots of heavy editing for my project. The model features a great deal of complex curves, all smoothed over, and it would help out a great deal if I could work with them with the surface split back up into individual polygons and all lines visible. Is there a way to turn the surface back into the original grid quickly and easily, without having to painstakingly trace the invisible lines over again?