Not a huge deal by any means, just a little "nice to have" idea, but especially when I'm working on compacting a layout for a blueprint, it'd be cool if there were a quick way to check the dimensions of it rather than manually counting tiles or temporarily placing down multiple objects of known length. And it's the kind of thing that I think people would quickly find other neat little uses for. I'm envisioning something like what Terraria has (see attached image), though of course it'd probably need to be two clicks or a click and drag since there's no player character to pin one corner of the measurement to.