What snapping technique to scale edges out to be exactly upright in this case? I'm wondering if there's a snapping technique I could use to get a
scaled edge ring to be exactly straight up and down?
I can just scale and guess, by eye, that the edges that get scaled out
are exactly upright, but I want to be exact, without having to set the
location of each vertex manually.
Thanks for any ideas.
While this is no general answer to how to solve the snapping problem and might not work for more complex shapes, in this particular instance I think it's easier to not rely on scaling but instead use Loop Cut and Slide, cut exactly at the bottom and then manually move the added edge loop upwards. For the upwards translation you could use exact numbers or vertex snapping (while restricting the movement to the Z axis) to end up at the height of your existing loop.