I am brand new to design and this software. I was able to put my house into the plan  and incorporate it into the lot size and elevation. (the elevation of the lot drops 5'5" over the total length of 130" length lot).  I built a deck off the back of the house and the deck elevation looked great. I then added the garage  in the backyard as well and all seemed to look great. I then somehow hit a button asking about foundations, (and said the previous changes cannot be saved- which I unfortunately