There are a lot of options available to you as you're placing an element. Once your element is placed, the range of options to manipulate it is severely reduced, the results of which you're seeing now. If you ever discover how to make happen what you're looking for, I would love to know about it, because I've looked for the same functionality.
What you may want to do is create a new element. For your first point, specify the location that you want the tie to happen. For the second point, you can specify a location in the negative direction, and you can specify it to be 40' in that direction, with whatever slope or whatever other elevation you require.
What you may want to do is create a new element. For your first point, specify the location that you want the tie to happen. For the second point, you can specify a location in the negative direction, and you can specify it to be 40' in that direction, with whatever slope or whatever other elevation you require.