Say whaaaaat, right?? It's witchcraft. You can now see through the painted model just as you can with the onion skinning feature in Flash.
So all I've done here, it's really easy I promise, is make a clone palette of the one currently in place. To do this, select the palette to be cloned in the colour view. Then in the colour view menu select Palettes > Clone.
Then name your new cloned palette. Make it clear and easy to remember.
So now you just need to take the transparency way down on the fills in the new palette. I made my fills %25.
*This is also a perfect way to create new palettes for your painted character rig, such as a night time palette!
*If there is more than one palette loaded, the system will use the one highest in the palette list.