Hi Danny, yeah like Rob mentions the way to do this in MoI is to turn on control points for the curves that you want to stretch.

Then when you do a window select, only some control points will be captured and when you move them it will perform the same result that you are looking for.

Here is an example:




The stretch function that is included in some drafting programs works in this exact same way, they just basically enter into a special mode when that command is started so that only control points are picked to be modified even if points are not currently being displayed.

For MoI just turn on control points first. As an added bonus, you will specifically see which control points are going to be modified before you do the operation, allowing you to adjust the selection if necessary.

- Michael