For years I have created an alignment from polyline. There have been a couple of times when after extensive corridor and assembly work was done that the alignment needed to have multiple radii deleted and/or added. When going to edit the curve geometry in the editor it appears that the curve Tangency Constraint and Parameter Constraint vary widely.

Is there a way to delete a PVI in an alignment when a curve has already been established?

I really have multiple questions from wrestling with this scenario so I am wondering if someone could point me to the best "Edit Alignment Geometry" video/link they know of?