Hi, Im stil learnin so I hope I will find answer here. I can change height, width, depth and horizontally rotate both beams and slabs. But I cant rotate them vertically. How I can do that? The beams I would like to vertically rotate (slope) are the one colored in wallnut on the upper part of the "garden". They need to be lowered a bit (sloped donwnards) towards the outter end.