you could write a few lines of script that loops through the vertices and draws the indices at their locations. or you look up the indices in your modeler like captain kiyaku mentioned.
the first approach should work but you can not draw all the indices at their location at the same time
it would be a bloody mess
The second approach seem to be faster but I wonder whether ět really works
I mean, the coords which you read in your editor and the figures stored in the "Vertices" array are, of course, related numbers but are they also the same numbers?
If I import the same model from different file formats I get different scale factors and different global coords
Did all file format store exactly the same local coords for the same model ?
