How can I convert an edge loop to a curve? I saw a cryengine video in which an edge loop is dragged to adjust it just like the ones in paint. I am not sure if that feature is available in Blender. If yes, would greatly help in modelling objects like bridges, arches etc. The link to the video: https://m.youtube.com/watch?v=0X123xPlyWM the curve is used in 00:18 of the video.
Anyone who lands here from a search engine, in Blender 2.8, Alt + C doesn't do anything. Curve from Mesh is not even available in the space bar menu. You have to select it from Object > Convert to menu.