1. Use the left, right, up, and down arrow keys on the left to orient your model so that it is right-side-up and facing to the right.
2. Use the + and - keys to resize your model to what you want it to be at size one. The lattice cube of size 1 is there for reference. Note: Any part of your model sticking out of the cube will not be detected in collisions.
3. Use the up and down arrow keys on the right to adjust the position of your model at ground level, with the bottom of the lattice cube being the ground.
4. Use the "Flip Lighting" button to make sure that your model appears lit up before submitting.