Note: use Notepad++ to open egg files

If your editor is very slow when opening or editing egg files (especially huge ones), try Notepad++ (notepad-plus.sourceforge.net/). It is free and works very fast even with huge eggs.

I use Komodo Edit in JavaScript mode, this gives you highlighting but most importantly code folding. So that i can fold the vertex and geom definitions a way to see egg’s structure.