Hi Moi3dFan, you're welcome I'm glad that is useful.

re:
> - Points in "Make Point" mode are added to the polyline itself. You can made
> checkbox for this mode.
> Of course, I can cut the curve by these points and then connect them, but I want a shortcut.

I've updated the script (attached in message above) to have an additional polyline mode where it generates a polyline with the new points in it.


> - Note that, in "Make curve" mode. If a polyline has only one point selected, then
> after applying the script the whole polyline turns into a curve. This is rather wrong,
> for I want to smooth out one point.

I've also updated it so that it will only smooth selected points and leave unselected ones as sharp corners.

- Michael