When I sub-select the upper edges, and then move them in Z +2 using gumball, I get different results.
The larger one is still degree 2, the smaller one becomes degree 3.
What causes the different results?
And how to avoid the degree change?
On selection, while Ctrl+Shift is held, I get the ‘Select Object’ dialog.
Hmm, I clearly click the edge.
Also V5 doesn’t ask for what I mean.
ExtendSrf does not change the degree because it works with the existing surface, and only extends surrounding edges. On the other hand, picking an edge and moving it (which you can move in any direction) the command refits.
In the smaller surface in the example, there is a small bend (the surface is not trimmed only from the top, there is another trim along the side). This is causing the calculation of a new surface that fits. ExtendSrf can handle it because it only extends surrounding edges and use the same surface.