It is easy to draw in the 3D Sketch in ortho mode and control the geometry by applying constraints and dimension to straight lines, but that is not always the case with splines, I know we have control vertex spline which give you a lot of control, but there are occasions where I have to use the interpolation spline and I need to set the points from the spline to a specific position on the X,Y & Z origin after the curve have been created, and to be able to control it that way I have to create construction geometry because if I just add dimensions will only control the length but not the direction and I might want to control the height or depth of the curve etc...
An option and easy way to do this could be by being able to apply and maintain the dimension constrain to an axis, plane or even an object.


