Tangency in Sketcher -- Magnitude options?

I assume there is nothing. However, I was wondering if there is some way (that I have been missing) of doing more than just merely creating a tangency contraint between two spines etc in sketcher. For example, in Style, when you create a tangency contraint at an endpoint of a line/curve, you also specify the "amount" of tangency by entering a magnitude value or dragging a handle. It's like an illustration software like Adobe Illustrator etc.

However, in sketcher there is no such way of controlling the "amount" of tangency? Do I have that correct? Just checking. It would be so much nicer if you could do this.