Hi Metin, you can use the Transform > Move command to do that.

Select the point you want to line up between the others.

Run Transform > Move.

For the base point snap on the point that you want to move.

For the target point, drag out a construction line between the other 2 points and then snap the target point on that line.


The dragging type move won't work for this both because it's awkward to create a construction line in it and also when dragging it won't snap onto other control points because that tends to make it easy to get points stacked up right on top of each other which degrades the quality of the curve.

At some point I'd like to see if I can get the Transform > Align command to also work with a custom direction instead of only horizontal/vertical.

- Michael