On the Today's Game screen, press L Button, R Button, L Button, R Button and you'll hear a confirmation tone, and the cursor will disappear. For low gravity, press Up on Control Pad, R Button, A Button, L Button. For high gravity, press Up on Control Pad, Down on Control Pad, L Button, Up on Control Pad, R Button. Press Start and the cursor will reappear, and you can begin play with Gravity Options enabled.