[cbk1994]

You should probably avoid MNG, it's seldom used anymore in the real world, and rarely in Graal.

The offline tools support PNGs, but only PNG 8 (which is limited to 256 colors and no semi-transparency). If you've been using GIF, you're used to these limits anyway. Photoshop can save as PNG 8.

PNG 24/32 (Photoshop combines these with the "transparency" checkbox iirc) can be used online only but allow > 256 colors and semi-transparency.

GIMP and the like probably allow saving like this but I'm not familiar with it. If you have Fireworks, I'd highly recommend that over Photoshop for web graphics (like Graal's).

If you're looking for animation support, PNG doesn't have it, unfortunately.