Edit mode is for creating position files, and for testing positions by moving the characters back and forth (and/or resizing them). It is not intended for normal gameplay. Once you've created a position file, you should close the Animtools Edit Mode window and then use the "Play SDT Loader" shortcut to launch the actual game. You can then load your position file (via the F2 key). You can also use any SWF or MOD files that you've downloaded - such as Dante's custom heads. If you don't intend to create or customize position files, then there's no need to use the "Play Animtools Editmode" shortcut at all.