In pursuit of comfortable interface the surveyor was enhanced to exactly specify the kind of tile you are mousing over.
Not long after is has been improved to also tell the type of building and ship classes pointed at. The last one may be especially useful given some ships are assymetric. With rotation tossed in it might not be immediately obvious what one is looking at.
Buildings taking shape
Buildings can have module slots and upgrade slots. Modules are bulk elements, defining main capabilities. Upgrades are small improvements enhancing efficiency or making things slightly better. One may choose freely from a number of each, provided prerequisites are satisfied.
Trade with buildings other than yours is not yet possible. The interface begins to work for NPC entities like planets and starbases.