I think we are having a terminology miscommunication here.
A spline point is a control vertex for the spline:
I can grab the gray arrow and whatever they call the other thing and change the curvature and tangency at that point:
Now if I offset the spline, no spline points get added to the offset because they would allow me to adjust the offset and it would no longer be an offset. For that same reason you cannot add additional spline points to an offset...Because by definition it would no longer be an offset.
But you can add Sketch Points:
And I can add dimensions to that sketch point from existing geometry and the point will move along the spline:
Is that more clear? If not I'm going to need some more information as I requested in the post above.
What exactly are you trying to do? When you offset a spline it is controlled by the spline it is offset from and I don't know if it's the correct term, but it's "fully defined". If you were able to add spline control points to an offset spline, it would no longer be an offset spline. I hope that makes sense. If not please elaborate on what you are trying to do.
Now, you can add sketch points to the offset spline that will slide along the spline, or you can add a dimension or relation to other geometry to lock the point down.
I see so if i wanted to draw two splines after sketching the offset spline points i would be able to make spline points in line remain parallel between the to points.
Okay I will copy and paste the spline.
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