Ibanez gax75

So I have this gax75 but When I got it off my friend he didn't have the drop d tuner strung up. So I never have used it. But now my strings broke for the 3rd time now. So I figured I would give it a shot. But I have no idea how to put the string on it so that it works. Now I also have no idea how this works. Does it just let me flip the thing and I'm in standard tuning or what? If somebody could please help me out with this it would be appreciated. Thanks