How do I convert the Maestro Sport from 5-point harness mode to booster mode?

To convert to booster mode, loosen the harness, press the harness release button, and remove both harness straps from the splitter plate and pull them through to the front. Then disconnect all elastic loops and retaining strips, remove the seat pad, remove the crotch strap, route the harness straps through the adjustment slots and reattach them to the splitter plate, then fold and tuck the harness and chest clip into the recesses on either side of the seat shell, and reinstall the seat pad. To convert back to 5-point harness mode, reverse these steps. (Page 37–40)