I am constructing house and environment. For my mental stability, the reference elevation is 0 := FFL (finished floor level). This means that that the garden's elevation is below 0.

The rest of the world is at height 0 which does not look so well. My garden is certainly not a pit digged into the groud as the air view suggests.

What would help here is a setting for the world's elevation. If set to -90, it would be at about my garden's height.