Hi Val, for a case like that you won't be able to use the edit frame, you'll need to use the Transform commands.

Go to to the Transform palette in the side pane, and use the Transform > Scale > Scale 1D command located here:



That will allow you to pick both the scaling origin and also the scaling direction by clicking 2 points, you can orient the direction in any particular direction that you need to apply the scaling in.

- Michael