When creating a sketch (and/or working with splines) there are some situations where everything appears to be constrained by constraints. Lines have dimensions, the splines are fixed and it looks like no line or point or the entire sketch can be dragged around. Beside that the pin icon is still missing on the sketch indicating I might be missing something.
I would request some sort of improved visual cue what is missing here (on demand). All the lines are black (except the fixed spline) in the screen cast but I cannot see what is missing here.
So a manually triggered function that might highlight the non-constrained features or another way of locating them would be quite useful, I suppose.