Thanks David,
I went to the custom backsplash, because the soffit doesn't allow me to rotate in the transform/replicate window.
In the Home designer photo in my original post, specifically, I am having trouble moving that object with the yellow arrow (soffit or custom backsplash) so it's 45 degrees to the walls. Any advice how to move the object to that specific orientation? Maybe if you could even point me to a video that is similar. I just can't find anything.
Thanks,