I have drawn a curve which starts tangent along X axis and ends tangent along Y axis, its v similar to a quarter of an elipse.
Having traced a working curve with InterpCrv I wish to lessen its points now and also improve the curvature graph a little.
Rebuild did fine but I then noticed the tangent along Y axis was lost.
When I mirrored the curve as I need this one but a bit different for the half an elipse sort of shape, the graphs overlapped.
Which command will retain the tangents whilst improving the curve to iron out any subtle variations, no S bends etc.
Otherwise the option would be to then trace this with InterpCrv starting and ending tangent !