Cutting build plates for easier editing

When creating on your build plate, it's rather difficult to edit internal structures. I propose that build plates can be split into fourths (16ths if it's a 16x16 build plate). These pieces can be deselected and made transparent to allow, for example, building inside a quaint little house. Vertical functionality could be added as well, possibly indicated by little arrows representing a 2 block height, which would allow for the exclusion of a 8x8x2 level (16x16x2 in larger plates).