Hi Burr, that's an interesting idea, but then they would be one of these "just wave the mouse around" type systems rather than an accurate one.

To do an accurate one, it basically needs to reference points in the 3D scene rather than just being attached to moving the mouse up or down.

Like for example here:



The reason why something like the above can work is because you're grabbing a point in the model and moving it to another point in the model which can then be a snap location... If scaling worked only more like the viewport zoom button where just moving up or down by some amount of pixels scaled up or down, it wouldn't be able to be connected to a specific snapped target point like the frame can do.

- Michael