need help regarding steam bake.  in instructions it indicates to put  water in steam Tray provided and put on the bottom of the oven. (is it completely on the bottom or  on position 1. 
if it is on bottom, what happens if there is no more water in the pan  

Video on youtube and instructions for my 27 inch wall oven are different.  i tried putting water in the bottom but water  leaks out of the oven.  Please advise