[Inkscape-user] bezier tool settings

Hi all

Is there any way to adjust Bezier curve helper points so that they remain aligned, i.e. they remain on a straigth line that runs over the central point? In this way, curves don't make sharp turns unless helper points are over the central point.

If this is not implemented, I could help with it if someone could point me to the file. I have already done this in a java plugin for ImageJ.

Albert