To better parametrically control tangent curves to other geometry, I suggest that the Curve command be improved with a "Stretch Value" at each of both tangent endpoints, similar to what already exists with the Boundary Surface command. In the curve command, there is a Curve Tweak Option, but it's not parametric, and gets reset when one of the tangent points or entities is redefined. As a workaround, we could first create twoo surfaces at both endes, then a boundary surface, tangent to both temporary surfaces, and then copy one of the edges of the generated tangent surface to have a curve that have it's tangent vectors length to be parametrically controlled, which is quite tedious. It's better to have the tangent control "stretch value" at curve creation also, and not only on the surface creation, as currently is the case.
